句型

[主動] = 原形V + 受詞 + …

[被動] = Let + 受詞 + be + p.p. + …

例句

Do it at once. (立刻做它。) = Let it be done at once.

Close your book. (闔起你的書。) = Let your book be closed.

觀念

不及物動詞加上介詞以後，就能有受詞；主動語態如含有「動詞 + 介詞 + 受詞」的結構時，變為被動語態時，不要忘記介詞。

例句

Mary laughed at me. (瑪麗嘲笑我。)= I was laughed at by Mary.

I am looking for you. (我正在找你。)= You are being looked for by me.