【正文】
詞的過去分詞”構(gòu)成 ,助動(dòng)詞 be有人稱、數(shù)的變化 ,其變化規(guī)則與 be作為連系動(dòng)詞時(shí)一樣。 如: The desk is made of wood. The desks are made of wood. He is asked a question by the teacher. I was given a nice present by my friend yesterday. 3)被動(dòng)語態(tài)一般現(xiàn)在時(shí)結(jié)構(gòu): is/am/are/+過去分詞 A)肯定句形式: 如: It is used for cooking. I am looked after well every day. Many trees are planted every year. B)疑問句形式: Is it used for cooking? Are you looked after well every day ? Are many trees planted every year? What is it used for? Where are you looked after well? C)否定句形式: It is not used for cooking. I am not looked after well every day. Many trees are not pla