2) It will rain .
It will not rain.
3) I should drive .
I should not drive.
缩写形式：cannot=can’t
will not=won’t
should not=shouldn’t
将下列句子改为否定句: Lily and Tom will walk to school.
_____________________________ 4. They will go to the Great Wall.
_____________________________
判断：肯定句or否定句
(肯) 1. I am a doctor. (否) 2. I am not a doctor. (肯) 3. He goes to school by bike. (否) 4. He does not go to school by bike.
not 何处安放？
秘诀
有be用be，有情用情，无情无be用助
be动词
be动词有三种形式，他们分别是：
is am are
情态动词
can(可以，能够) will(将要) should(应该)
助动词
do （原形） does（三单） did (过去式）
否定形式:don’t 否定形式:doesn’t 否定形式: didn’t
1. 句子中有be，在be后加not。
1) I am a student. 2) They are blue. 3) It is a dog .
I am not a student. They are not blue. It is not a dog.
缩写形式：is not=isn’t are not=aren’t am not不能缩写
第三人称单数， 主语后+doesn’t
He doesn’t swim every day.
打回原形
注意：助动词后的动词要打回原形。
将下列句子改为否定句: 1. He has a shirt. _H_e__d_o_e_s_n_’t__h_a_v_e_a__s_h_ir_t.
2. They help each other. T__h_e_y__d_o_n_’_t_h_e__lp__e_a_c_h__o_t_h_e__r.__
Lily and Tom will not walk to school.
如果原句子没有be动词也没有情态动词，
怎么办？
3. 句子中无情无be，用助动词。
①I like autumn. 动词原形，主语后+don’t I don’t like autumn.
②He swims every day.
Hale Waihona Puke 谢谢观赏By Qiming English
将下列句子改为否定句: 1. It is a tiger.
It is not a tiger.
2. You are short. You are not short.
2. 句子中有情态动词，在情态动词后加not。
1)You can pick apples . You cannot pick apples.
3. Tom wants a cat. _T_o_m__d_o_e_s_n_’t_w_a_n_t__a_c_a_t_. _________
4. They will go to the Great Wall. _T_h_e_y_w__il_l _n_ot__g_o_t_o__t_h_e_G_r_e_a_t_W __a_l_l.
一招搞定句型转换
Ms Liao 2018.09.16
课首小测
将下列句子改为否定句: 1. I get up at 7 o’clock.
_____________________________ 2. Mike is good at basketball.
_____________________________ 3. Tom wants a cat.
Now, you try!
Exercise
1. I get up at 7 o’clock. _I_d_o_n_’t__g_e_t_u_p__a_t _7__o’_c_lo_c_k_._______
2. Mike is good at basketball. _M_i_k_e_i_s_n_o_t_g_o_o_d__a_t_b_a_s_k_e_t_b_a_ll_. ___