I usually forget to lock the door or locking the door

[ROBINDESBOIS]

Which structure is correct? And why?

[bobjenkins]

Originally Posted by ROBINDESBOIS

Which structure is correct? And why?

Forget to lock the door

[Perikles]

The 'locking' is a present participle and the verbs to remember and to forget always take an infinitive, such as

I forgot to bring some money
I forgot to lock the door
I forgot to bring the keys

I remembered to bring some money .... etc.

However, the participle can be used with a difference of meaning in cases like this:

When I came home, I found the door of the house open, and this was strange because I distinctly remember locking it.

This is when you have a mental image of yourself doing something.

[ROBINDESBOIS]

I know that but my question is in cases like:
I usually forget locking or to lock, this is not a past action not sth I have to do. SOOO?

[Perikles]

Originally Posted by ROBINDESBOIS

I know that but my question is in cases like:
I usually forget locking or to lock, this is not a past action not sth I have to do. SOOO?

Remember and forget take the infinitive in all tenses:

I had forgotten to lock the door
I have forgotten to lock the door
I forgot to lock the door
I used to forget to lock the door
I always forget to lock the door
It is always annoying when I forget to lock the door
Next Tuesday I shall forget to lock the door.
Next Wednesay I shall have forgotten to lock the door.

And in the imperative
Don't forget to lock the door
.
.
.
.

[hermit]

I would take "to forget locking the door" as "to forget having locked the door". (When perhaps you meant to leave it unlocked)

[CrOtALiTo]

Originally Posted by ROBINDESBOIS

Which structure is correct? And why?

I forgot look the door.
I forgot close the door.

I don't know if that is the you really want to say there.

[Perikles]

Originally Posted by CrOtALiTo

I forgot look the door.
I forgot close the door.

I don't know if that is the what you really want to say there.

Read my post Forget needs an infinitive, and you know what that is in English because you use it in "you really want to say". The infinitive in English (usually) has a to in it.

I forgot to close the door.

Don't forget to include the to.

[ROBINDESBOIS]

Well according to grammar books we use
I forgot locking the door
Don´t forget to lock the door.

[Ambarina]

Originally Posted by ROBINDESBOIS

Well according to grammar books we use
I forgot locking the door
Don´t forget to lock the door.

I forgot locking the door = I locked the door but I forgot that I had locked it.
I forgot to lock the door = I did not lock the door because I forgot.