Gerund & Infinitive

[Dinhtuong]

Could you tell me the difference and usage of
Infinitive is a subject of a sentence.
Gerund is a subject of a sentence.
when we use an infinitive as a subject
when we use Gerund as a subject

[sash2008]

Could you tell me the difference and usage of
Infinitive is a subject of a sentence.
Gerund is a subject of a sentence.
when we use an infinitive as a subject
when we use Gerund as a subject

Hi Dinhtuong,
Infinitive is not a subject, but it is the main verb of a sentence of giving an order, a command, or a request.
The subject of this sentence is removed and it is the pronoun "you".


Write your homework. (complete sentence)

Writing your homework. (incomplete sentence as it lacks the main verb)

Writing your homework is a means by which you can get high marks. (complete sentence)

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Open the door,please.(complete sentence)

Opening the door (incomplete sentence as it lacks the main verb)


Opening the door is / can /....... (complete sentence)

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Play tennis.(complete sentence)

Playing tennis (incomplete sentence as it lacks the main verb)

Playing tennis is very amusing.(complete sentence)

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the main verb is not necessarily verb to be;
it may be any other verb such as: helps - can -have - improve- provide - etc...........

[Pedroski]

Use an infinitive or a gerund as subject or object whenever the situation calls for it. That depends entirely on what you want to express and how you would like to express it. You can nearly always write a sentence in another way and still express the same sentiment.

To swim regularly is good for you. or A regular swim is good for you.
Swimming is good for you. or I have been swimming every day for my health.

[sash2008]

Use an infinitive or a gerund as subject or object whenever the situation calls for it. That depends entirely on what you want to express and how you would like to express it. You can nearly always write a sentence in another way and still express the same sentiment.

To swim regularly is good for you. or A regular swim is good for you.
Swimming is good for you. or I have been swimming every day for my health.

Oops! I misunderstood the question.
Yea, I agree with your answer.
Thank you Pedroski.