No. 'What did you do lately' is correct. The word 'did' puts the verb into the past, and it takes the infinitive form of the verb, not the past tense.
'What song did you sing yesterday?' NOT 'What song did you sang yesterday?'
'What did he eat this morning?' NOT 'What did he ate this morning?'
'Did they open the box?' NOT 'Did they opened the box?'
Yes it is a grammatically correct
This is not grammatically correct. The correct form is 'you do not know', or the abbreviated 'you don't know'.
'Rhoda's crazy' is grammatically correct.
Sure. It would also be grammatically correct to write He spoggled his nubbix on the goober. Grammatically correct and meaningful are not the same.
I am, you are, he/she/it is, we are, they are.
"Not like that" can be grammatically correct, depending on the context.
Yes it is a grammatically correct
Yes! That is grammatically correct!
Yes, 'for free', is grammatically correct.
This is not grammatically correct. The correct form is 'you do not know', or the abbreviated 'you don't know'.
Yes, Almighty God is grammatically correct.
"That was wrong" is a grammatically correct sentence.
Yes, it is grammatically correct.
'Rhoda's crazy' is grammatically correct.
'What a drunkard you are' is a grammatically correct English sentence.
"For free' is grammatically correct. It is an idiom of the English language.
The sentence is grammatically correct.