He works hard ,dosen't he?He doesn't work hard,does he?原则上,前面肯定,后否定.前否定,后肯定.疑问尾句的主语只用人称代词,及there.It's unfair,isn't it?前缀构成的否定,只把它看成肯定.There is a book on the...
He works hard ,dosen't he?He doesn't work hard,does he?原则上,前面肯定,后否定.前否定,后肯定.疑问尾句的主语只用人称代词,及there.It's unfair,isn't it?前缀构成的否定,只把它看成肯定.There is a book on the...