2. 当由一般疑问句充当宾语从句时,用if或whether引导,意为“是否”。 (1) Is it an interesting novel? I don’t know. I don’t know if /whether it is an interesting. (2) Does Cathy go to school early? Do you know? Do you know if /whether Cathy goes to sc...
3.either用于否定句,一般放在句末。如: They don't know the answer, either. 她们也不知道答案。 4.as well as也有"也"的意思。如: We have great mushroom pizza as well as soda. He is a happy boy as well.
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