1. Only infinitives can be used as objects. Such as burden, consent, decision, rejection, failure, hope, proposal, pretend, promise, rejection, hope, etc.

2. Only -ing objects can be used. Such as recognition, avoidance, consideration, denial, procrastination, enjoyment, completion, imagination, mind, practice, adventure, suggestion and postponement, abandonment, etc.

You can use infinitive and -ing. Such as start, start, like, like more, membership, regret, need, try, meaning, etc.

For many verbs in the third case, there are still some differences between the two forms.

Start, start, continue, etc. There is generally no obvious difference between the two forms.

(2) like, love, preference, hate, etc. There is no difference between infinitive and -ing. But for willing, willing to love, willing, you can only use infinitive.

(3) Remember, forget, regret, infinitive means the future, -ing means the past. Regret doing "regret to ..."; Regret doing "regret doing")

(4) The active forms of need, want, require and ing are equivalent to the passive forms of infinitives. (Need to do = need to do)

5] Stop and continue. Stop doing "stop what you are doing"; Stop and do "stop and do another thing" (here stop is an intransitive verb and infinitive is an adverbial of purpose). Keep doing "keep doing what you did before", = keep doing = keep doing; Keep doing "keep doing another thing".

[6] strive to "do your best"; Try to do "try to do it"

I was going to do "going to do it" = going to do it; It means doing means. ...

Help to do "help to do something"; Can't help doing it ...

In addition, for allow, permit, advise and forbidden, the object is -ing, and the object is the complement of pragmatic infinitives. Allow sb to do, etc.

Summarize the main situation briefly, I hope it will help you. Of course, memorizing one by one is an inevitable process, and there may be specific problems to be analyzed when making the meaning of the question. There is no subject in the progressive tense.

To do can be the subject.

I'll believe that when I see it.

Being a gerund can be a subject.

Helping others makes me happy.

I am willing to help others do it.

Go, write in the book is an infinitive phrase. Look at its composition in the sentence when you use it. He goes to school at six.

Xiaoming has lunch at school.

I want to go to school.

When you use be, you should also change it to am, is and are.

I use am and you use are for him, her and it.