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他妻子走了之后他才来。
He didn't come until his wife left. →It was not until his wife left that he came.
他是在结婚之后才认识玛丽的。
It was after he got married that he got to know Mary.
It is / was... that / who/ whom...
在强调地点或时间状语时， 切记不能用where 或 when
Tom lost a wallet in the car park last night.
It + be+ 被强调部分+ that （ who/whom） + 句子其他部分
强调主语It was Tom who lost a wallet in the car park last night.
强调宾语It was a wallet that Tom lost in the car park last night.
强调时间状语It was last night that Tom lost a wallet in the car park.
