一般将来时的被动语态构成:will+ be + 及物动词的过去分词
Many more trees will be planted next year.
含有情态动词的被动语态构成:情态动词+ be + 及物动词的过去分词
Young trees must be watered often.
. 现在进行时的被动语态构成:am / is / are + being + 及物动词的过去分词
Uncle Wang is mending my bike now.→ My bike is being repaired by Tomnow.
. 不定式的被动语态:to + be + 及物动词的过去分词
There are two books to be read. → There are twenty more trees tobe planted.