把has改为had
因为从句的谓语动词left是一般过去时,所以主句的谓语动词用过去完成时才对.
句意为：他去美国之前已经学了三年英语了.
leave for 去/到达某地
谢绝抄袭
改错He ha already learned English for three years befor he lef
3个回答
相关问题
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1.He has already learned English (for three years)(对打括号里的提问)
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