网络课程高中

被动语态的使用情况

(1)当不知道或没有必要指出动作的执行者时，这时往往不用by 短语。

如：

“Mr. White, the cup was broken after class. ”

怀特先生，这只茶杯是下课后被打碎的。

(2)突出或强调动作的承受者，如果需要说出动作的执行者，用by 短语。

如：

These records were made by John Denver.

这些报道是被约翰·丹佛做的。

被动语态中谓语动词的基本构成

be done

被动语态的构成

(1)一般现在时：am / is / are done。

如：

①People grow rice in the south of the country.

→Rice is grown in the south of the country.

稻米在这个国家的南部被种植。

②The school doesn’t allow us to enter the chemistry lab without a teacher.

→We are not allowed to enter the chemistry lab without a teacher.

我们不被允许在没有老师的情况下进入化学实验室。

(2)一般过去时：was / were done。

如：

①They agreed on the building of a new car factory last month.

→The building of a new car factory was agreed on last month.

建立一个新的汽车工厂在上个月被一致同意。

②The students didn’t forget their lessons easily.

→Their lessons we