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一般用什么问就用什么来回答。 但以下例外：Is this a pencil? Yes , it is./ No, it isn't. Is that your backpack? Yes , it is./ No, it isn't. Are these your parents? Yes, they're./ No, they aren't. Are those Jim's brothers? Yes, they're./ No, they aren't. 当句子中没有be动词，也没有情态动词时，变一般疑问句时，在主语前加助动词do (I, we, you,以及复数), does（第三人称单数she,he,it等）变成问句； (责任编辑：admin) |