I am asked to study hard.
Knives are used for cutting things
我要努力学习。
刀是用来切割东西的。
2.一般过去时的被动语态构成：was / were + 及物动词的过去分词
A new shop was built last year.
Dinosaur eggs were laid long long ago.
去年建了一家新商店。
很久以前恐龙蛋。
3.现在完成时的被动语态构成：has / have
This book has been translated into many languages.
Many man-made satellites have been sent up into space by many countries.
这本书已被译成多种语言。
许多人造卫星已被许多国家发射到太空中去了。
4.一般将来时的被动语态构成：will/shall+ be + 及物动词的过去分词
A new hospital will be built in our city.
Many more trees will be planted next year.
我市将新建一所医院。
明年将种植更多的树。
5.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.
Your mistakes should be corrected right now.
年轻的树木必须经常浇水。
你的错误现在应该得到纠正。
6.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
My bike is being repaired by Tom now.
Trees are being planted over there by them.
我的自行车，汤姆正在修。
树被他们种在那里。
7.不定式的被动语态：to + be + 及物动词的过去分词
There are twenty more trees to be planted.
有二十棵树要种。
8.过去将来时的被动语态：would /should+ be + 及物动词的过去分词
He said he would finish the work soon.
He said the work would be finished soon by him.
他说他将很快完成这一工作。
他说这工作很快就完成了。