why was he punished by his teacher ? it was because he cheated in the exam
意思是:为什么他被老师惩罚了?
要腔调的是 他被惩罚的”原因“ 而不是”他”这个人
was 是 is 的过去时
所以还是
It was(is) because + 从句
从句时he cheated in the exam 他考试作弊
如果用he who~就会出现两个主语重叠,是不正确的
用whom宾格就更不对了
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希望对你有用
wh-is it ~~~that 是什么?
是what it is么