Revision:
1、Ask some students to tell us some examples of the differences between Am. English and Br.
English in pronunciation, spelling, and grammar.
2、Revise “Attributive clauses introduced b y who, whom, whose, that and which”.
Presentation
介词 + which / whom 引起的定语从句
介词 + which / whom 引起的定语从句, 介词一般由定语从句的动词而定,能构成词组；介词与先行词有介宾关系。
e.g. 1. He is the boy whom / who / that we are talking about 把about提前，则得到：
He is the boy about whom we are talking (talk about).
2.The pen which / that I wrote the article with is gone. 把 with提前，则得到：
The pen with which I wrote the article.(write sth. with sth.)
注：1. 有时在介词前面可以用数词或代词，表示数量，构成：数词 / 代词 + 介词 + which / whom 引起
