Tom has studies Chinese for two years.（同义句转换）It ___ two year

Tom has studies Chinese for two years.（同义句转换）It ___ two years __ he __ to study Chinese.
There mey be rain from time to time.(同义句转换)
_____ it ____ _____ ____.
动词填空：
Could you drive a car in the past?No,it's the first time I____(drive)
Tom ___(forget)to bring his Chinese book.His teacher is very angry now.
I'm sorry you ___(come)too late.Mr Liu left half an hour ago.