Read English every day,you'll be good at it.（改为同义句）

be good at it = do well in it.

每天读英语时,你会做得很好。

Read English books daily, you'll improve on it.

Study English daily and you'll improve on it.

You'll improve English through daily studies.

You'll improve English through daily reading.

You will be very good at English, if you read it every day!