地点状语从句考题透析
'请看下面一道题:When you read the book, you’d better make a mark _________ you have any questions.A. at which B. at where C. the place where D. where ...'
名词性wh-从句
17.3 名词性wh-从句 1)由wh-词引导的名词从句叫做名词性wh-从句。Wh-词包括who, whom,. whose, whoever, what, whatever, which, whichever等连接代词和where, when, how, why等连接副词。Wh-从句的语法功能除了和that-从句一样外,还可充当介词宾语…...
as,which非限定性定语从句
18.6 as, which 非限定性定语从句 由as, which 引导的非限定性定语从句,as和which可代整个主句,相当于and this或and that。As一般放在句首,which在句中。 As we know, smoking is harmful to one's health. The sun heats the earth, which is …...