Subject: omit, unexpressed

English is a Non-Pro-Drop language (meaning we normally hate omitting subjects), yet it does use these “Subjectless” non-finite clauses everywhere.

“How”: Licensing by Non-Finiteness

In English, the finite verb is the “legal enforcer” of the subject. If a verb has a tense (is, was, uses, used), it must have an overt subject. This is because English lost almost all its verbal agreements (no different endings for I, you, he), so it needs the subject to tell us who is acting.

However, non-finite verbs (to use, using, used) do not carry tense. Because they are “de-tensed,” the grammar licenses (permits) the subject to be unexpressed.

Is it unique to English?

No, but the way we use it is distinctive.

In English, we never omit the subject of a finite verb in matrix clauses. We only allow omission in subordinate non-finite clauses (there are edge cases, but this is almost always the default)

What is unique is how much English relies on this to manage information. Because the word order is so rigid (Subject-Verb-Object), the only way we can “hide” a boring subject (like “anybody”) is to collapse the clause into a non-finite form.

Why do we do it? (The Functional Reason)

English allows this omission for economy and generalization.

  • Economy: If the subject is obvious or irrelevant, English prefers to delete it to get to the “point” faster.

  • Generalization: By omitting the subject in “easy to use,” you move from a specific person’s experience to a universal property.

The “Inverse Relation”

There is a fascinating rule in English syntax: The more “noun-like” a verb becomes, the less it needs a subject.

  • Full verb (finite):

Anyone uses it. (subject mandatory)

  • Infinitive (non-finite):

To use it is easy. (subject optional)

  • Gerund (noun-like):

Using it is easy. (subject usually omitted)

  • Noun: The use of the tool.

Subject completely gone)

Mechanism

Mechanism of unexpressed subject:

Mechanism

Example

CGEL interpretation

Control

Kim wants to leave

Subject understood via controller

Raising

Kim seems to leave

Subject syntactically in matrix clause

Implicit subject

Leave now!

Pragmatically supplied (you)

Passive omission

The window was broken

Agent suppressed

Hollow clause

easy to use __

optional subject omission

Construction

Unexpressed subject constructions in English:

#

Construction type

Clause form

Example

Where is the subject?

How it’s interpreted

1

Infinitival (control)

Non-finite (to-inf)

Kim wants [to leave]

Not overt in subordinate clause

Controlled by Kim (matrix subject)

2

Infinitival (raising)

Non-finite (to-inf)

Kim seems [to like it]

Not overt in subordinate clause

Raised to matrix subject (Kim)

3

Gerund-participial (supplement)

Non-finite (-ing)

[Leaving early], Kim avoided traffic

Not overt in subordinate clause

Controlled by Kim

4

Gerund-participial (complement)

Non-finite (-ing)

Kim enjoys [swimming]

Not overt in subordinate clause

Usually controlled by Kim

5

Passive clause (agent omission)

Finite

The window was broken

Agent not expressed

Interpreted generically / contextually

6

Imperative clause

Finite

Leave now!

Subject omitted

Understood as you

7

Non-finite clause with overt subject (for contrast)

Non-finite (to-inf)

[For Kim to leave] is surprising

Subject is overt (Kim)

No omission (included for contrast)

8

Hollow clause (NOT subject gap)

Finite / non-finite

This tool is easy [to use __]

Subject present (this tool)

Gap is object, not subject

Usage

This is a specific “loophole” in English. The non-finite hollow clause is the only structure that allows to:

  • Keep the verb (to keep the action alive).

  • Kill the subject (to make the claim universal).

  • Kill the object (to keep the focus on the matrix topic).

It is a “Subjectless” world that feels authoritative because it doesn’t sound like an opinion—it sounds like a definition.

Most languages can do this, but English’s version—the Tough-construction(CGEL)—is particularly “clean” because it results in that short, punchy, “Hammer Blow” ending.

Summary

English is a “Subject-Mandatory” language that uses “Subject-Omission” as a specialized tool for high-level abstraction.