第1个回答 2009-06-22
1. This is the book that my sister bought yesterday.
定语从句,后面的it 要去掉。
2. He helps to clean the house and wash the dishes at home.
help to do sth 帮助做... (惯用法)
第2个回答 2009-06-22
第一句,it去掉。因为前边已经有特指the book,后边如果在用代词it 来说的话,意思重复了。
第二句,是对的..美国小说里都这样写..不知道中国的语法怎么会给它加上TO DO STH
第3个回答 2009-06-22
This is the book that my sister bought yesterday.
定语从句的引导词就是从句中‘brought’的宾语,‘it’式多余的;
He helps to clean the house and wash the dishes at home.
如果,‘help sb. doing/do something',但这里‘help’后面没有宾语,应当加上‘to do...’。
第4个回答 2009-06-22
第二句help to do=help do,to可以省略
第5个回答 2009-06-22
This is the book which my sister bought yesterday。
把 that 改成 which. 去掉 it.
He helps cleaning the house and washing the dishes at home。
clean 和 wash 后面加ing.