what?which one is correct.

Sry i'm asking about why we can't use she doesn't "likes" instead of like because she is a third person.

No that's not my doubt,i'm asking about she check her email...it is a correct answer when i was choose. But here why we can't use she "checks" instead of check that's my doubt

Really I can't understand you &your both words are same i mean singular so i,we,you,they- we use do only right then here why can't use do your sister.

yes i'm also have this doubt?

?

Then why we are using have and then when we should use have it makes me confuse

why we can't say like this