Yes, as in 'He was the lesser known author of the group'. Lesser can describe an adjective as in that sentence, or it can be used as a comparative, as in 'the lesser of two evils'.
"She did not have" is the proper grammar.
"Don't it" is not proper grammar. The correct form is "doesn't it".
It is proper grammar to say, "I bet you".
No! It is should HAVE plus the participle, often contracted to should've in speech.
no, that is definitely not proper grammar.
No, it is not proper grammar. The correct phrasing is "you and I."
What was there is proper grammar.
It is proper grammar.
There are many grammar practice websites that will help people learn proper English grammar. These are necessary since many people have no idea what proper grammar is these days.
It's you are, you is is not proper grammar.
yes
It's you are, you is is not proper grammar.