period 4 grammar and usage
to learn how to use a preposition + which/whom to begin an attributive clause and how to use relative adverbs in attributive clauses
important and difficult points:
how to choose suitable prepositions in an attributive clause.
step 1. revision
hw checking: understanding some colloquialisms
step 2. grammar and usage
preposition +which and preposition +whom
read point1 and make sure students know when to use attributive clause with preposition.
the pen is broken, so i’ll have to buy a new one. i write my homework with it every day
the pen with which i write my homework every day is broken, so i’ll have to buy a new one.
the man is over eighty. i bought the old picture for him.
the man for whom i bought the old picture is over eighty .
read point 2, get them to write the sentences in formal english.
the maths teacher is the person from whom i got an a plus.
art is the subject about which i know little.
read point 3 and 4,and ask them to write the sentences in different ways.
dad is a person to whom i can easily talk.
dad is a person whom/who/that i can easily talk to.
dad is a person i can easily talk to.
appendix 1) “介词＋关系代词“可以引导限制性定语从句，也可以引导非限制性定语从句。“介词＋关系代词“结构中的介词2) 像listen to, look at, depend on, pay attention to, take care of等固定短语动词，在定语从句中一般不宜将介词与动词分开。例如：
this is the boy whom she has taken care of.
词可以是 in, on, about, from, for, with, to at, of, without 等，关系代词只可用whom或 which,不可用 that 。
当先行词是way的时候,我们可以使用that 或in which引导定语从句.在这种情况下that 或in which也可以省略
step 3. exercises:
1. language is a city, to the building of ____ every human being brought a stone.
a. which b. that c. it d. this
2. the residents, ____ had been damaged by the flood, were given help by the red cross.
a. all their homes b. all whose homes
c. all of whose homes d. all of their homes