•A traffic accident _h_a_p_p_e_n_e_d_(happen) just now.
2. 连系动词(Link.v.) 如:be, look, seem, feel, sound, smell, taste, get, turn, become…
•Peking Opera _s_o_u_n_d__s_ (sound) beautiful.
主动语态
被动语态
使 make sb do sth sb be made to do sth
役 have sb do sth 动 词 let sb do sth
sb be had to do sth sb be let to do sth
see sb do sth sb be seen to do sth
主语 谓语
宾语
Our classroom is cleaned by us every day 结构:主动语态:主语+谓语+宾语
被动语态:主语 be +过去分词 by+宾语
即:、主变宾、宾变主,谓语动词变被动。” (注:主变宾即主语变为介词by宾语)
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[注意]①把主动语态改为被动语态时,句子的时态不能变。且be动词和新主语保持一致。如上例,所给的主 动句子是一般现在时,改为被动语态时,也要用一般现在时。 ②如果主动句中的主语是人称代词,改为被动句时作介词 by的宾语,要用宾格。如上例中的主语we 改为us。
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C. The teacher let them leave the classroom after class. —They were let to leave the classroom by the teacher after class.