Verbs: Auxiliary verbs

Verbs:

• Auxiliary verbs: modal, non-modal

• Lexical verbs

Lexical verbs	Auxiliary verbs
	Non-modal	Modal
allow, bring, come, drink, eat, find, go, hold, invite, join, know, learn, meet, navigate, own, persuade, quell, rip, stand, televise, undertake, vilify	be, have, do	can, could, may, might, must, shall, should, will, would

Important

The forms could, might, would, should are the preterite forms of the modal auxiliaries can, may, will , and shall , respectively. They differ very considerably in their uses from ordinary preterites, though.

Distinctive properties of English auxiliary verbs

Subject-auxiliary inversion

Only auxiliary verbs can invert with the subject in interrogative clauses.

She has taken the money

Has she taken the money?

She takes the money

Takes she the money? (lexical verb, ungrammatical)

Does the take the money? (add dummy auxiliary “do” )

The dummy auxiliary permits compliance with the grammatical requirements.

Note

Dummy auxiliary has no meaning of it’s own (it’s non-modal). It just permits the correct grammar.

The dummy auxiliary “do” cannot be used in combination with another auxiliary verb:

Does she take the money? (dummy do + lexical verb)

Does she have taken the money? (dummy do + auxiliary verb)

Negation

Simple negation with simple clause construction is permitted with auxiliary verbs but not with lexical verbs:

She has taken the money

She has not taken the money

She takes the money

She takes not the money

Again, we need the dummy “do”:

She does not take the money

She does not have taken the money (dummy not allowed with another auxiliary verb)

Note

Some verbs with clausal complements can be followed by not as a modi er in the following clause

I try not to be late

Primary inflectional negation forms

Tense	Modal auxiliary	Non-modal auxiliary
Preterite	He couldn’t swim. She wouldn’t help us.	They hadn’t finished.
Present	He can’t swim. She won’t help us.	They haven’t finished.

Absolutely no lexical verbs have forms of this kind: *tookn’t, *taken’t, etc. These are not contractions:

• No general rule of pronunciation would yield won’t from contracting will + not, can’t from can + not, shan’t from shall + not

• Every auxiliary has a negative form, not every form has a corresponding negative. “amn’t” doesn’t occur, “mayn’t” dropped out of use, etc. If it is a contraction, then these and other would be possible

• In subject–auxiliary inversion constructions, the n’t forms occur where auxiliary not is impossible:

Isn’t it ready?

Is not it ready?

Won’t I need the ticket?

Will not I need the ticket?

• There are semantic differences. Can’t does not always have the same meaning as can with not following it:

The roof rack can not be attached (expresses an option, leave the roof rack if you want)

The roof rack can’t/cannot be attached (a complain, fitting is impossible)

Modal auxiliaries (modals)

Only primary form

Modals and the auxiliary “do”

They can’t appear in constructions requiring secondary forms.

Modal auxiliary does not allow secondary form:

You must work hard (primary)

You will must work hard (plain form) You are busting work hard (gerund-participle) You’ve must work hard(past-participle)

Non-modal auxiliary allows it:

You have to work hard (primary)

You will have to work hard (plain form) You’re having work hard (gerund-participle) You’ve had work hard(past-participle)

No distinct third singular agreement form in present tense

The modal auxiliaries show no agreement with the subject, having the same form for all subjects:

I must leave now (1st singular)

She must leave now (3rd singular, the same)

I have to leave now (1st singular)

She has to leave now (3rd singular, present tense, inflected)

Bare infinitival complement

The prototypical modal auxiliaries take a single complement with the form of a bare infinitival clause.

Nearly all other verbs that select infןnitival complements take the to-infinitival kind

Note

There are lexical verbs that are followed by bare infinitivals, but very few

One is help:

We helped clear up the mess, .

There is also one verb that qualifies as a modal auxiliary by the first two criteria but (for most speakers, anyway) needs an infinitival with to: the verb ought:

He ought to be more careful.

Dually classified verbs

Most important: do, have

A handful of verbs belong to both auxiliary and lexical verb classes. They show auxiliary behaviour under some circumstances and lexical verb behaviour elsewhere.

The most important ones are “do” and “have”.

Do

Do(aux) is a dummy, and auxiliary

D(lex) is a lexical verb

Does(aux) she do(lex) it?

Note

Do became an auxiliary due to a shift from executing a concrete action to carrying the weight of the statement itself.

Do went from being a verb about physical activity or causation to a structural tool for manipulating assertions:

• Insisting on their truth

• Denying them

• Turning them into questions

Causation and concrete action:

In Old and Middle English, dōn was a heavy main verb meaning to make, perform, or cause. In fact, one of its primary early uses was causative.

I do build a house.”

In Middle English, that often meant:

I cause a house to be built

i.e., I am having builders construct it for me.

You were the initiator of a physical action.

The Mental pivot:

Separating 'Action' from 'Meaning'

Over time,speakers began pairing do with other verbs not to show causation, but to highlight the pure performance of the event.
Instead of just saying:

I speak

Saying:

I do speak

Content vs. execution

Split the statement into two distinct mental components: The action itself: “speak”, the content, and the fact that it is being performed: “do”, the execution.

Poets in the 14th and 15th centuries seized on this because it made rhyming easier—they could put do in the middle of a line and shove the infinitive (speak, go, fall) to the end.

Something deeper was happening: “do” became mentally detached from any specific real-world action and attached to the concept of assertion.

Complete abstraction:

The Sacrificial Verb

By the 1500s, early Modern English, English word order was undergoing a massive shift toward a strict Subject–Verb–Object structure.

Questions used simple inversion:

See you the ship?

Negation just tacked not onto the main verb:

I see not the ship.

As speakers grew uncomfortable moving main verbs around or attaching not directly to them, English needed a “sacrificial” verb — a dummy element that could take the grammatical hit so the primary verb could stay untouched in its standard position.

Do was the perfect candidate because its original meaning had already bleached away into a general symbol for “taking action.

You see >> Do you see? (replaced See you)

I see it >> I do not see it (replaced I see not it)

The original verb stays put.

For emphasis: Do carries the force of truth when contradicted:

I do see it!

Purely to manage tense, negation, and questioning

Ultimately, do was stripped of its original physical meaning (“to perform/cause”) and turned into an abstract grammatical lever — an dummy.

Have

• Have is always an auxiliary when it indicates perfect tense (where it normally occurs with a following past participle).

• It also has a (lexical) use expressing a state rather than a process or action.

He has enough money (possession) You have to sign both forms one such state (obligation),

• There’s also a dynamic use of have, occurring in clauses describing events. This use of “have” always shows lexical verb behaviour.

He often has tantrums

They had us running all over town; She’s having a baby

I had it wrapped up by lunchtime.

Note

The essence of how have became an auxiliary comes down to a shift in human perspective: moving from possessing a finished object to “possessing” an accomplished action.

At its core, the Present Perfect isn’t really a tense that looks backward at the past—it is an aspect that looks at the present state resulting from a past event.

Have was the natural candidate for this because possession is intrinsically a present-state concept.Here is the conceptual leap in three natural stages:

Pure possession of an object:

In early Old English, have was strictly about physical ownership.

I have the letter written

You literally meant:

I currently possess a letter, and that letter happens to be in a written state. “written” was just an adjective, and have was the main verb of physical possession.

Crucially, you didn’t even need to be the person who wrote it—you just held the paper.

2. The Mental Pivot (Possession of a Result)

Psychological overlap occurred. In the vast majority of daily situations, if you were holding a letter that you had caused to be written, holding the finished result meant you were responsible for the action.

Old mindset:

I possess an object [which is written].

New mindset:

I possess the completed state of writing this letter.

Have stopped being about your hands holding a physical object and started being about your connection to a completed event .

Complete abstraction:

Possession of the experience.

Once have was reinterpreted as “holding a completed state,” the physical object became optional.

The word order flipped from Have + Object + Verb

I have the letter written”)

To Have + Verb + Object

I have written the letter

Once that structural change took root, speakers made the ultimate abstract leap: applying have to verbs that don’t produce a physical object at all.

I have slept

I have walked.

This past action is tied to me right now.

Have lost its heavy physical meaning (semantic bleaching) and was refined into a pure grammatical tool.

Auxiliary verbs in English

Most of the auxiliary verbs in English (the ones with the special properties relating to inversion and negation) carry information about tense, aspect, voice, or the modal.

Category	What it expresses	Examples
Tense	When the situation is located (relative to the speech time): present or preterite.	She works. / She worked.
Aspect	How the situation is viewed over time (ongoing, completed, prior, etc.).	She is working. (progressive) · She has worked. (perfect)
Voice	The relationship between the participants and the verb, especially whether the subject is the actor or the affected participant.	The dog chased the cat. (active) · The cat was chased. (passive)
Modality	The speaker’s assessment of possibility, necessity, obligation, permission, prediction, willingness, etc.	She may come. · You must leave. · He will arrive soon.

Sue has written the preface (have, perfect tense)

Sue is writing the preface (be, progressive aspect)

The preface was written by Sue (be, passive voice)

Sue may write the preface (may, can, must etc., modality)