# <at> (the) last moment/night

I am confused about using these terms.

1- He came at last night.
2- He came last night.
3- He came at the last night.
4- He came the last night.

1.1- He came at last moment.
1.2- He came last moment.
1.3- He came at the last moment. (Seems ok)
1.4- He came the last moment.

I am confused, because I know #2 is correct but why not #1.2 then? And if #1 is correct, why not #1.1 ? Or tell me if they are already so.