DBAABABD
判断使用关系代词还是关系副词的关键,是看后面的句子成分是否完整.
1.turn to sb.For help 是向某人求助的意思.后面的句子少了sb.也就是谓语,所以要用to whom
2.后面句子完整就用关系副词
3.as 引导非限制性定语从句
4.a 顺序换一下就是he knows his subject thoroughly is sth.important.少了sth.就是少了谓语所以用what来替代
b．He went to the meeting and insisted on speaking.整个句子完整,中间只是插入语
5．The farmer uses wood to build a house to store grain in It．少了in It,which用来代替it
6．少一个谓语love sb．宾语用whomever
7．time不可数不能用a, 用the．后面句子完整用副词.