It is important for us to learn English.
It is kind of you to help me
sincere means honest.
The boy is called/named Tom.
We regarded/consider it as an honor.
It is English that we should learn.
It is he who helped me a lot.
Your sentence doesn’t sound/look/appear/feel right.
You look/seem as if/as thought you had been there before.
Maybe/Perhaps/ she is ill.https://www.ienglishcn.com/
He is probably ill.
He is likely ill.
It is possible that he is late
He can remember so many English words, that is (to say) he is a living dictionary.(活字典）
That sounds all right, but in fact it is not.
It is more a picture than a poem.
He or you are wrong.
Either he is right or I am.