which is correct?

[blouen]

Be able to (main verb be + adjective able + infinitive to) is a BE + adjective construct and so the adjective portion of that construct describes the structural subject:

Hi Cas, do you have as site to teach this "structure things" of grammar? I want to know the rules of English...thanks!

[sayd19]

Thank you mykwyner for your care.
so, now this sentence " The door isn't able to be closed " is correct?
i have deleted " by him" , so now is it true???

[Casiopea]

Hi Cas, do you have as site to teach this "structure things" of grammar? I want to know the rules of English...thanks!

The structural subject is what you see. It's the word or phrase that acts as the subject of the passive verb. The non-structural subject, also called the semantic subject, is what you don't usually see. It's what acted out the main verb:

Structural subject: subject of was written
Ex: The exam was written 2 years ago by our committee.

Semantic subject: acted out the verb write
Ex: The exam was written 2years ago by our committee.
check: Our committee wrote the exam 2 years ago.

Does that help?

[blouen]

Yes it does...thanks!!

P.S. Do you have a site that teaches grammar and those structures of sentences...

[Casiopea]

Yes it does...thanks!!

P.S. Do you have a site that teaches grammar and those structures of sentences...

Would this site help?

Active and Passive Verbs

[blouen]

Thanks Cas, this is going to be really helpful!

[Casiopea]

You're most welcome.