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nted every year. 4)被動(dòng)語(yǔ)態(tài)過(guò)去時(shí)態(tài)結(jié)構(gòu): was/were+過(guò)去分詞 . A)肯定句形式: 如 : It was used for cooking by people in old the days. Many trees were planted last year. B)疑問(wèn)句形式 : Was it used for cooking in the old days? Were many trees planted last year ? When were the trees planted ? 否定句形式: 如: It was not used for cooking in the old days. These trees were not planted last year. 4)含有情態(tài)動(dòng)詞被動(dòng)語(yǔ)態(tài)的結(jié)構(gòu) :情態(tài)動(dòng)詞+be+過(guò)去分詞 A)肯定句形式: 如 : English can be spoken by us.(被動(dòng)語(yǔ)態(tài) ) English must be