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先观察原句
后自主感悟
①This traffic problem led to the development of the underground system.
②In 1884,the Metropolitan Railway Company and the Metropolitan District Railway linked up...
③When London was bombed,many underground stations functioned as bomb shelters.
④But you will have to fill in a form and then we will decide on the best way.
⑤We could split up into groups,and come at different times.
⑥I can call you back later.
1.所有例句中黑体部分在句中作谓语;它们不是一个词单独作谓语而是由动词加一个介词或副词一起作谓语。
2.例句①、例句③和例句④中黑体部分的构成特点是它们都是由动词加介词构成的,相当于及物动词,可以直接带宾语。
3.例句②中黑体部分的构成特点是由动词加副词构成的,其后不接宾语;若接宾语,需要加介词,如例句⑤。
4.例句⑥中黑体部分的构成特点是由动词加副词构成的,其后可以加宾语。宾语为代词时,必须放在动词与副词之间。
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