高中英语语法不定式的用法PPT课件

A. to do
B. to be done
C. done
D. Both A and B
2. I have a lot of homework ________.
A. to do
B. to be done
C. done
D. Both A and B
3. His words are hard _____________ .
( to understand ?) ( to be understood?)
4. The water in that river is not fit ______________ . ( to drink? ) ( to be drunk? )
Step 6 疑难点： 不定式的主动形式表示被动
1．在there be / seem 结构中。 e.g 1) There is a lot of homework to do (也可用to be done) 2) There is no time to lose (to be lost).
Step 1 ： Revision
不定式的时态和语态
不定式有时态和语态的变化， 时 态 共 四 种 ， 即 一 般 式 、 完__成__式___ 、 __进__行__式__ 和完成进行式。语态分为 _主_动____ 语态和被动语态，如下表所 示。
时态 语态 主动语态
被动语态
一般式 to do
to be done
区别：I have a lot of homework to do. （不可用 to be done)
体会下列两句的区别 1. Do you have anything to wash today? 你今天要洗什么吗？
（to wash的逻辑主语为句子的主语you）
2. Do you have anything to be washed?
4. The library assistant doesn’t allow the magazines _t_o__b_e_t_a_k_e_n_____ ( take ) away by students.
Step 5 疑难点
1．There is a lot of homework ______．
2. She didn’t like __to__b_e__t_r_e_a_t_e_d_ ( treat )
as a child.
3. His dream was _t_o__b_e__a_d_m__i_t_te__d__
( admit ) to a good university.
4. There are a lot of things _t_o__b_e__d_is__c_u_s_sed
Step 4 Comparison
1. He wanted his son _t_o_p_o_s_t____ (post) the letter at once.
2. He wanted the letter _to__b_e_p_o__s_te(pdost) at once.
3. The library assistant doesn’t allow students ___t_o_t_a_k_e________( take ) away the magazines.
to the ceremony.
主语
2. She didn’t like _t_o__b_e__tr_e_a_t_e_d__ ( treat ) as a child. 宾语
3. His dream was _t_o__b_e_a__d_m__it_te__d___ ( admit ) to a good university. 表语
完成式
to have done
to have been done
进行式 to be doing
ቤተ መጻሕፍቲ ባይዱ
/
完成进行式 to have been doing
/
Step 2 Fill in the blanks with the correct forms of the given verbs
1. Peter will get married next month. It’s an honourt_o__b_e__in__v_it_e__d( invite ) to his wedding ceremony.
(to be washed不是you做，而是由
“我”或 其他人 来做)
你有什么要 其他人/ 我 洗的吗？
I am going to Beijing tomorrow. Do you have anything _t_o__b_e__b_o__u_g_ht ( buy )?
2．在“n／pron + be + adj + to do” 结构中。常用的形容词有easy， hard ， light，heavy，expensive, cheap， impossible， interesting， important， nice，pleasant，fit， dangerous 等。
1. 好的小说读起来有意思。 Good novels are interesting to read.
2. 这个问题容易回答。 This question is easy to answer.
3. 这个盒子提起来很重。 This box is heavy to carry.
4. There are a lot of things t_o__b_e__d_is__c_u_s_s_ed ( discuss ) . 定语
5. She was sent there __t_o_b__e_t_r_a_in__e_d_____
( train ) for the space flight. 状语
( discuss ) .
5. She was sent there ___t_o__b_e__tr_a_i_n_e_d____
( train ) for the space flight.
Step 3 Tell the functions of the
infinitives
1. It’s an honour _t_o__b_e__in_v_i_t_e_d( invite )