(完整版)if条件状语从句_语法
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3. If you boil water, it becomes steam.
4. If you feel tired, you must have a rest. 条件状语从句
语法1：if作为宾语从句 的引导词，引导宾语从 句。（是否）
语法2：if（如果）引 导的条件状语从句
❀ if 用于宾语从句中
3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 4. ____ he will come is not decided.
作主语只能用whether
If 引导条件状语从句
Complete the sentences with the correct form of the words.
_I’_ll_p_l_a_y_b_a_s_k_e_t_b_a_ll_.
If it is sunny this weekend, what will you do ?
If it is sunny this weekend,Байду номын сангаасI __w_i_ll_p_l_a_y__ football with my classmates.
If it is sunny this weekend, I _w__o_n_’_t _w_a_t_c_h_t_e_le_v_i_s_io_n__.
practice
If you are free this weekend, what will you do ?
sleep
If I am free ,… watch TV
if条件状语从句要用一般现在时。
What will you do if you’re happy?
❖ If I’m happy, I will _cl_a_p_m__y_h_a_n_d_s_. ❖ If I’m happy, I will _s_ta_m__p_m__y_f_e_e_t . ❖ If I’m happy, I will _n_o_d_m__y_h_e_a_d__. ❖ If I’m happy, I will __w_i_n_k_m__y__e_y_e_s_.
1.If you __li_s_te_n__(listen) to the music, _b_u_y__ (buy) a CD.
2. If he___is___ (be) late for school,d_o_n_’t_w__ait
(not wait ) for him.
3. If you _b_u_y_ (buy) a new camera, __g_et_ (get)
a good one.
4. If the light _d_o_e_s_n_’t__co_m__e_ (not come) on, _w__a_it (wait) for one minute.
If 条件状语从句（1）
句型结构
祈使句+if条件状语从句 if条件状语从句，+祈使句（从句后加逗号）
时态
Look and say
If I’m hungry,
I will_e_a_t_s_o_m__e__fo_o_d__.
If I’m tired,
I will__h_a_v_e_a__r_e_s_t __.
Look and say
If I’m ill, _I_w_i_l_l _s_e_e__a_d_o__c_to__r_.
当句末为or not时，引导词只能用whether而不能用if.
If 与whether 的区别
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
2. I don’t care of ______ he is handsome. 介词后只能用whether
If it is sunny this weekend, I__________.
If it is sunny this weekend, what won’t you do ?
If it is sunny this weekend, I _W__o_n_’_t _s_ta_y__a_t_h_o_m__e____.
If从句 条件状语从句
What will I do if it is sunny this weekend?
Part1:If 的用法
1.I want to know if he will go to park with us. 宾语从句 2. We will have a picnic if it doesn’t rain.
原句式 引导词 从句语序
一般 whether 改为陈述句
疑问句 /if
语序
由从属连词whether, if 引导的宾语从句
e.g. 1. I want to know _i_f_(_w_h_e_t_h_e_r_) _h_e_w__il_l_g_o_t_o__th_e__p_a_r_k_w__it_h_.us
play computer games
if条件状语从句(2)
句子特点： 1.if从句中用一般现在时，表示未来的一种条件， 从句中可以加时间状语。 2.当if表示未来的条件时，主句中用一般将来时。 句型结构： 主句+if条件状语从句 if条件状语从句，+主句（从句后加逗号）
（他是否跟我们一起去公园）
2. Ask him _w_h_e_t_h_e_r_(_i_f)_h__e_c_a_n_c_o_m__e. （他是否能来） 3. I didn’t know _w_h_e_t_h_e_r_i_t_w_a_s__g_o_in_g__t_o_r_a_i_n_o_r_n.（ot是否要下雨）
If I’m late, _I _w_i_ll__s_a_y_s__o_r_ry____.
If it rains tomorrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,
4. If you feel tired, you must have a rest. 条件状语从句
语法1：if作为宾语从句 的引导词，引导宾语从 句。（是否）
语法2：if（如果）引 导的条件状语从句
❀ if 用于宾语从句中
3. He wondered ______ to stay here the next week.
与to do 不定式连用只能用whether 4. ____ he will come is not decided.
作主语只能用whether
If 引导条件状语从句
Complete the sentences with the correct form of the words.
_I’_ll_p_l_a_y_b_a_s_k_e_t_b_a_ll_.
If it is sunny this weekend, what will you do ?
If it is sunny this weekend,Байду номын сангаасI __w_i_ll_p_l_a_y__ football with my classmates.
If it is sunny this weekend, I _w__o_n_’_t _w_a_t_c_h_t_e_le_v_i_s_io_n__.
practice
If you are free this weekend, what will you do ?
sleep
If I am free ,… watch TV
if条件状语从句要用一般现在时。
What will you do if you’re happy?
❖ If I’m happy, I will _cl_a_p_m__y_h_a_n_d_s_. ❖ If I’m happy, I will _s_ta_m__p_m__y_f_e_e_t . ❖ If I’m happy, I will _n_o_d_m__y_h_e_a_d__. ❖ If I’m happy, I will __w_i_n_k_m__y__e_y_e_s_.
1.If you __li_s_te_n__(listen) to the music, _b_u_y__ (buy) a CD.
2. If he___is___ (be) late for school,d_o_n_’t_w__ait
(not wait ) for him.
3. If you _b_u_y_ (buy) a new camera, __g_et_ (get)
a good one.
4. If the light _d_o_e_s_n_’t__co_m__e_ (not come) on, _w__a_it (wait) for one minute.
If 条件状语从句（1）
句型结构
祈使句+if条件状语从句 if条件状语从句，+祈使句（从句后加逗号）
时态
Look and say
If I’m hungry,
I will_e_a_t_s_o_m__e__fo_o_d__.
If I’m tired,
I will__h_a_v_e_a__r_e_s_t __.
Look and say
If I’m ill, _I_w_i_l_l _s_e_e__a_d_o__c_to__r_.
当句末为or not时，引导词只能用whether而不能用if.
If 与whether 的区别
1. I don’t know _____ he will come or not. 与or not 连用只能用whether
2. I don’t care of ______ he is handsome. 介词后只能用whether
If it is sunny this weekend, I__________.
If it is sunny this weekend, what won’t you do ?
If it is sunny this weekend, I _W__o_n_’_t _s_ta_y__a_t_h_o_m__e____.
If从句 条件状语从句
What will I do if it is sunny this weekend?
Part1:If 的用法
1.I want to know if he will go to park with us. 宾语从句 2. We will have a picnic if it doesn’t rain.
原句式 引导词 从句语序
一般 whether 改为陈述句
疑问句 /if
语序
由从属连词whether, if 引导的宾语从句
e.g. 1. I want to know _i_f_(_w_h_e_t_h_e_r_) _h_e_w__il_l_g_o_t_o__th_e__p_a_r_k_w__it_h_.us
play computer games
if条件状语从句(2)
句子特点： 1.if从句中用一般现在时，表示未来的一种条件， 从句中可以加时间状语。 2.当if表示未来的条件时，主句中用一般将来时。 句型结构： 主句+if条件状语从句 if条件状语从句，+主句（从句后加逗号）
（他是否跟我们一起去公园）
2. Ask him _w_h_e_t_h_e_r_(_i_f)_h__e_c_a_n_c_o_m__e. （他是否能来） 3. I didn’t know _w_h_e_t_h_e_r_i_t_w_a_s__g_o_in_g__t_o_r_a_i_n_o_r_n.（ot是否要下雨）
If I’m late, _I _w_i_ll__s_a_y_s__o_r_ry____.
If it rains tomorrow, I_w_i_l_l _w_a_t_c_h__T_V__a_t_h__o_m__e. I won’t__p_la__y_b_a__s_k_e_t_b_a_ll_.
If it _d_o_e_s__n_’t__ra_i_n__ tomorrow,