条件状语从句课件 PPT
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she, not exercise enough, heavier If she doesn’t exercise enough,
she will be heavier. 1.主将从现
If he cleans the room , he can get $10 from his mother .
If I watch TV late , I can’t get up early . If you get up late , you must take a bus to school .
If you go to the party, you will have a great time!
If it is… What will they do this weekend?
If it is cloudy this weekend, they will go fishing
If it is sunny this weekend, they will play volleyball.
Dear Jenny,
❖ Correct and Write
If you don’t hurry , you’ll miss the train. 注意:从句放在主句之前或主句之后.如放在
主句之前,要用逗号与主句隔开.
If引导的宾语从句,常译为是否,应注意时态变化. I don’t know if he will come tomorrow.
If 后紧跟的句子叫从句,另一个句子叫主句, 主句和从句次序可以互相调换。
tomorrow.
如果你去， 我也去。 If you go,I will go.
如果明天下雨，请带雨衣。
Please take a raincoat if it rains.
1. If (如果……) 引导的条件状语从句, 主句用
一般将来时,从句用一般现在时.（主将从现）
I won’t go by plane if it rains tomorrow.
If he _g_o_e_s__(go) to the movies,he won’t finish his work. If I _b_e_c_o_m__e_(become) a doctor,I can help others.
If we __h_a_v_e__(have )time, we will go to the park
2.主句含有情态动词
If you are sad , please talk with us . If you are hungry , please eat some food . Please call me if he comes next Sunday.
3.主句是祈使句
结论:
If 引导的条件状语从句中: 从句用一般现在时态; 主句有三种情况 一般将来时态
If I have enough money, I will travel around the world.
If I study hard, I will go to college.
剑 桥 大 学
if 引导的条件状语从句 时态－－主将从现
主句一般将来时，从句一般现在时
例句１ 如果你努力工作，你的梦想将会实现．
If you study hard, you’ll get good grades.
You’ll get good grades if you 源自文库tudy hard. “主将从现”不仅在if条件句,也用在其它时间状从: （1）until引导的时间状语从句
The bus won’t start until everybody gets on .
If he always w__a_tc_h__e_s_T_V_ (watch TV ), he_w_i_ll_b_e__b_o_r_e_d_ (bored).
in the future
make a lot of money buy a big house
If I make a lot of money, I will buy a big house.
If you play computer games all day.
• you _w_i_ll_b_e__t_ir_e_d_. (tired) •your eyes _w_il_l _b_e_h_u_r_t. (hurt) •your parents __w_il_l _n_o_t _b_e_h_a_p_p_y__. (be not happy)
公共汽车直到每人都上车为止，才开动。
（2）as soon as （一…就）引导的时间状语 Mike will tell you as soon as he comes .
Mike一来就会告诉你。
no war, the world, more beautiful, If there is no war, the world will be more beautiful.
含情态动词的 祈使句
unless 除非,非……不可, 表强烈的否定
You will fail unless you work harder . 你不努力就会失败的。
Don’t come unless I call you . 我不叫你就别来 注意: unless表示否定,从句的谓语要用肯定式
误 : Unless you don’t work hard ,you will fail . 正 ：Unless you work hard ,you will fail . 正 ：If you don’t work hard ,you will fail .
If you work hard, your dream will come true. 例句２ 如果明天下雨，我将不出去散步． If it rains tomorrow, I won’t go out for a walk.
大家应该也有点累了，稍作休息
大家有疑问的，可以询问和交流
10
If 引导条状语从句时，从句中用一般现 在时代替一般将来时。
she will be heavier. 1.主将从现
If he cleans the room , he can get $10 from his mother .
If I watch TV late , I can’t get up early . If you get up late , you must take a bus to school .
If you go to the party, you will have a great time!
If it is… What will they do this weekend?
If it is cloudy this weekend, they will go fishing
If it is sunny this weekend, they will play volleyball.
Dear Jenny,
❖ Correct and Write
If you don’t hurry , you’ll miss the train. 注意:从句放在主句之前或主句之后.如放在
主句之前,要用逗号与主句隔开.
If引导的宾语从句,常译为是否,应注意时态变化. I don’t know if he will come tomorrow.
If 后紧跟的句子叫从句,另一个句子叫主句, 主句和从句次序可以互相调换。
tomorrow.
如果你去， 我也去。 If you go,I will go.
如果明天下雨，请带雨衣。
Please take a raincoat if it rains.
1. If (如果……) 引导的条件状语从句, 主句用
一般将来时,从句用一般现在时.（主将从现）
I won’t go by plane if it rains tomorrow.
If he _g_o_e_s__(go) to the movies,he won’t finish his work. If I _b_e_c_o_m__e_(become) a doctor,I can help others.
If we __h_a_v_e__(have )time, we will go to the park
2.主句含有情态动词
If you are sad , please talk with us . If you are hungry , please eat some food . Please call me if he comes next Sunday.
3.主句是祈使句
结论:
If 引导的条件状语从句中: 从句用一般现在时态; 主句有三种情况 一般将来时态
If I have enough money, I will travel around the world.
If I study hard, I will go to college.
剑 桥 大 学
if 引导的条件状语从句 时态－－主将从现
主句一般将来时，从句一般现在时
例句１ 如果你努力工作，你的梦想将会实现．
If you study hard, you’ll get good grades.
You’ll get good grades if you 源自文库tudy hard. “主将从现”不仅在if条件句,也用在其它时间状从: （1）until引导的时间状语从句
The bus won’t start until everybody gets on .
If he always w__a_tc_h__e_s_T_V_ (watch TV ), he_w_i_ll_b_e__b_o_r_e_d_ (bored).
in the future
make a lot of money buy a big house
If I make a lot of money, I will buy a big house.
If you play computer games all day.
• you _w_i_ll_b_e__t_ir_e_d_. (tired) •your eyes _w_il_l _b_e_h_u_r_t. (hurt) •your parents __w_il_l _n_o_t _b_e_h_a_p_p_y__. (be not happy)
公共汽车直到每人都上车为止，才开动。
（2）as soon as （一…就）引导的时间状语 Mike will tell you as soon as he comes .
Mike一来就会告诉你。
no war, the world, more beautiful, If there is no war, the world will be more beautiful.
含情态动词的 祈使句
unless 除非,非……不可, 表强烈的否定
You will fail unless you work harder . 你不努力就会失败的。
Don’t come unless I call you . 我不叫你就别来 注意: unless表示否定,从句的谓语要用肯定式
误 : Unless you don’t work hard ,you will fail . 正 ：Unless you work hard ,you will fail . 正 ：If you don’t work hard ,you will fail .
If you work hard, your dream will come true. 例句２ 如果明天下雨，我将不出去散步． If it rains tomorrow, I won’t go out for a walk.
大家应该也有点累了，稍作休息
大家有疑问的，可以询问和交流
10
If 引导条状语从句时，从句中用一般现 在时代替一般将来时。