ask, tell, want, need, wish, warn, advise, encourage, invite , expect …
howpisehsb. to do sth.
Complete the following sentences.
1.Mr Lu __a_s_k_s_u_s__to__h_a_n_d__in_ (要求我们交) our homework on time.
1. 别忘了离开时把灯关了。 Don’t forget to turn off the lights before leaving.
2. 父亲必须戒烟了。 Father must stop smoking .
3. 他看完电视后，继续看了一会书。 After he watched TV, he went on to read for a whi
睡。)
3、She ran fast _to__c_a__t_c_h__th__e__fi_r_s_t__b_u__s_(为了赶上早班
Ⅰ 不定式用作主语的用法
To grow trees is very important.
不定式作主语时,往往放在谓语 之后,用it作形式主语。
e.g. It is very important to grow
trees.
Say in another way, using ‘it’.
1.To learn from your friends is important. It is important to learn from your friends. 2.To leave without saying goodbye is
A.to eat not
B.eating not
C. not to eat D.not eating
3.Internet bars mustn’t let anybody A bad things , especially children.
A. watch B.to watch C.watching D.watches
3.They’re _tr_y_i_n_g_t_o__s_o_lv_e(试着解决) the problem by himself.
lions of people _h_a_v_e_l_e_a_r_n_e_d_t_o_u__s_e (已学 会使用) computers.
动词不定式作宾语的注意事项（ⅰ）
e.g. There is nothing to worry about.
ⅲsomething, anything, nothing…+adj.+ to do
e.g. I have something interesting to tell you.
Find the to-infinitive in each sentence. 1.Mr Wu is always the first to come and the
e.g. I heard her singing just now.
Ⅴ不定式用作定语
ⅰ不定式作定语时，应放在被修饰词的后面。
e.g. We have a lot of homework to do . ⅱ如果不定式中的动词是不及物动词,则不定式 中要有介词. e.g. He is looking for a room to live in .
Ⅲ不定式放在及物动词后，用作宾语 e.g. They began to read and write. e.g. She forgot to close the door.
常用动词不定式作宾语的动词有：
want, plan, hope, learn, decide, would like, begin, start, try, need, forget, choose, agree, promise
4. 这辆自行车需要修理了。 This bike needs_____re_p_a_i_r_in_g_/_m_e_n_d__in_g_______.
Ⅳ不定式用作宾语补足语
e.g. She asked me to speak more loudly. e.g. Lucy told him not to cry. e.g. Tell her to turn it down.
It is easy for him to speak English.
对我们来说，努力学习是必 要的。
It is necessary for us to study hard.
您能帮助我，真是太好了。
It is very kind of you to help me.
Ⅱ不定式放在be 动词后面， 用作表语
你那样做是有礼貌的。
It is polite of you to do that. = You are polite to do that.
It is + adj. + of sb. to do…= sb. is\are +adj.
+to do… (good, kind, nice, rude, clever, right, silly, brave,
last to leave. 2.There is no need to trouble him. 3.Have you got anything important to tell me? 4.I’ve got nothing to worry about. 5.I’m thirsty. Give me something to drink. 6.Spring is the best season to plant trees. 7.We all have a chance to go to college.
impolite. It is impolite to leave without saying
goodbye. 3.To chat with Miss White is a pleasant
thing. It is a pleasant thing to chat with Miss
White. 4.To walk to school takes me ten minutes. It takes me ten minutes to walk to school.
4.Mrs Read w__is_h_e_s__h_e_r_s_o_n__to__l_e_a_rn__ (希望儿子 学) English well.
☆不定式作宾补省去 to 的情况
(在被动语态中则to 不能省掉)
一感觉:feel 二听 hear
三使
let make have
listen to
四看 see watch look at
不定式作宾语时，如带有宾语补足语，则要 把 “ 式”不主结定语构式+动。放词如到+i：后t+宾面补，（用形it作容形词式、宾名语词，）构+不成定
e.g. I found it necessary to talk to him again.
e.g. I found it important to learn English.
Complete the following sentences.
1.I _h_o_p_e__to__h_e_a_r_f_r_o_m(希望收到…来信) you soon.
2.John _d_o_e_s_n_’_t_w_a_n_t__to__b_e(不想当) the host of the charity show.
Ⅵ 不定式用作状语
e.g. He came to show me his new CD player. (目的) e.g. I went there to see my teacher. (目的) e.g. She came back to get her English book. (目的) e.g. The boy was too frightened to move. (结果)
动词不定式 的构成： (not) to+do(动词原形)
A ‘to’-infinitive can be used as…
主语（Subject） 表语（Predicative） 宾语（Object） 宾补（Object complement） 定语（Attributive） 状语（Adverbial）
… thoughtful, selfish )
It is + adj. + for sb. to do…≠ sb. is\are +adj. +to do… (easy, hard, difficult, important,
…) possible, necessary
Translation
对他来说，说英语很容易。
Sb think/ find / consider/believe+ it+ adj. + to do
动词不定式作宾语的注意事项（ⅱ）
有些动词既可跟不定式作宾语，也可跟 动名词作宾语，但含义不同：
forget to do sth.忘记要做某事 forget doing sth.忘记曾经做过某事 stop to do sth. 停下来去做某事 stop doing sth.停止做某事 go on to do sth.继续做另一件事 go on doing sth.继续做原来在做的事 need to do sth.需要做某事 need doing sth. 需要被做
Complete some sentences:
1、I_n__o_r_d__e_r__to__i_m__p_r__o_v_e__h_i_s_E__n__g_l_is_h_(为了提高英语 成绩), Tom goes to the English corner every day.