被動(dòng)的結(jié)構(gòu)是 be動(dòng)詞+動(dòng)詞的過去分詞.
比如： They built the house. 這里用的是built,be動(dòng)詞要用過去式
The house was built by them.
The dog ate the bone. --->The bone was eaten by the dog.
She waters flowers every day. ---> The flowers are watered by her every day.
看明白了嗎? 前面兩個(gè)是過去時(shí)的被動(dòng),后面一個(gè)是一般現(xiàn)在時(shí)的被動(dòng).
其實(shí)最典型的例子是： I was born in Ningbo. 我出生在寧波.這里的出生其實(shí)是被生.