【正文】
元語法聚焦七 ( )3.— How often do I need to feed the dog? — It________ food every day, or it will be hungry. A. must give B. must be give C. must be given D. must be gave C [解析 ] 句意:它必須每天被喂食。 it與 give之間存在被動關(guān)系,使用被動語態(tài),其構(gòu)成是“ be+過去分詞”。 單元語法聚焦七 ( )4.[2022 安順 ] — Should a teenager ________ to get a driving license? — First go to a training center. A. be allow B. allow C. be allowed D. allowed C [解析 ] 含有情態(tài)動詞的被動語態(tài)的基本結(jié)構(gòu)是“情態(tài)動詞+ be+及物動詞的過去分詞”。 單元語法聚焦七 ( ) trees must ________ on the mountains. A. plant B. planted C. be plant D. be planted D [解析 ] must be planted意為“必須被種植”。 ( ) books ________ out of the reading room. A. can take B. can39。t take C. can be take D. can39。t be taken D [解析 ] “ can39。t be+過去分詞”構(gòu)成含情態(tài)動詞的被動語態(tài)。