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小学六年级英语练习问题(O_O)?

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小学六年级英语练习问题(O_O)?
① I saw a bird in the tree.(变否定句)
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③He went to a park yesterday.(变一般疑问句)
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④Amy flew kites last weekend.(向这个句子提问)
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很高兴为你作答.
① I saw a bird in the tree.(变否定句)
I didn't see a bird in the tree.
③He went to a park yesterday.(变一般疑问句)
Did he go to a park yesterday?
④Amy flew kites last weekend.(向这个句子提问)
When did Amy fly kites?(对last weekend提问)
Who flew kites last wekend?(对Amy提问)
What did Amy do last weekend?(对flew kites 提问)
若有不懂请追问.
再问: 第一道题为什么用did
再答: 因为saw是过去式,see变一般疑问句的时候需要用助动词do, 过去式是did,
再问: 那第二道题为什么要把 went 改掉
再答: went是过去式,变一般疑问句用助动词did, 助动词后面跟的是动词原形,所以把went变回go