(2)当主语为第三人称复数时∶问句∶ What are they doing? 答语∶ They are+动词-ing形式(singing,playing,swimming.)(+其他) 例∶ -What are they doing?他们/她们正在做什么? -They are waiting for the bus.他们/她们正在等公共汽车。 3.现在进行时的构成 (1)现在...
解析:本题the noise of中的of是介词,后面应该用-ing形式,desks作-ing的逻辑主语,所以答案为C。 原则六、-ing形式或to do可作主语或宾语,-ed形式则不可以 例11. ___ in a heavy traffic jamis quite an unpleasant experience. A. Caught B. Having caught C. Being ca...
2. ... begin to do ... ……开始做…… 3. Don’t do ... 不要做…… 4. ... try to do ... ……尽力做…… 5. ... is glad to do ... ……乐意做…… 语法点击—— 过去进行时(二) 【...
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