1.The island,joined to the mainland,is easy to go,为什么不能用joining?2.Sarah pretended to be cheerful,saying nothing about the argument.为什么不能用said?said不能看作是过去时吗?

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1.The island,joined to the mainland,is easy to go,为什么不能用joining?2.Sarah pretended to be cheerful,saying nothing about the argument.为什么不能用said?said不能看作是过去时吗?
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1.The island,joined to the mainland,is easy to go,为什么不能用joining?2.Sarah pretended to be cheerful,saying nothing about the argument.为什么不能用said?said不能看作是过去时吗?
1.The island,joined to the mainland,is easy to go,为什么不能用joining?
2.Sarah pretended to be cheerful,saying nothing about the argument.为什么不能用said?
said不能看作是过去时吗?

1.The island,joined to the mainland,is easy to go,为什么不能用joining?2.Sarah pretended to be cheerful,saying nothing about the argument.为什么不能用said?said不能看作是过去时吗?
岛是被人加入
Sarah是主动说
不能,主动用-ing;被动用-ed