被動(dòng)語(yǔ)態(tài)的主要用法
被動(dòng)語(yǔ)態(tài)中,主語(yǔ)是動(dòng)作的承受者,主要用于以下幾種情況：
1.不知道動(dòng)作的執(zhí)行者是誰(shuí).These books are written for children.The window was broken last night.
2.沒(méi)有必要指出動(dòng)作的執(zhí)行者是誰(shuí).
More trees must be planted here every year.The streets should be cleaned twice every day.
3.需要強(qiáng)調(diào)或突出動(dòng)作的承受著（接受者）.Chinese is spoken by more and more people around the world.
The old and the children must be taken good care of in China.
4.動(dòng)作的發(fā)出者不是人.
Many houses were washed away in the flood.Many tall buildings were destroyed in the earthquake.