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heisinterestedinithedounderstanditheisheisinterestedinithedounderstanditheisunderstandithedointerestedinit那句错,为什么

题目详情
he is interested in it he do understand it he is
he is interested in it
he do understand it
he is understand it
he do interested in it
那句错,为什么
▼优质解答
答案和解析
第四句,因为语法是be interested in