If you are happy, what will you do? If I am happy, I will smile.
If you become sad, what will you do? If I become sad, I will cry.
She is doing She gets good grades. her homework. If you are hard-working, you will get good grades.
1.If he____________ doesn’t do (not, do it ), I___________(do) will do it. are (be) late for school ,my teacher ________(be) 2.If you ____ will be angry. 3 If she________ wins (win) the prize ,we _______(be) will be happy. don’t eat will get 4.If I _________ (not,eat )so much ,I _________(get) thinner. won’t believe (not,believe) you. 5.If you ______(tell) tell them, they _____________ 6 I _________(stay) will stay at home,If it __________( rains rain). doesn’t rain will go 7.If it ____________(not,rain) ,I _________( go) out. will play sunny 8. we __________(play) football, If it is _________(sun) . becomes won’t send 9.If she __________(become) a star ,her parents ____________ (not,send) her away 10.He will _________(watch) watch TV ,if he ______(be) is free.
If I’m tired, have a rest I will_____________.
If it rains tomorrow, will watch TV at home I_____________________. play basketball I won’t________________. doesn’t rain tomorrow, If it _____________
I’ll play basketball ________________.
practice
If you are free this weekend, what will you do ?
If I am free ,…
sleep watch TV play computer games
If you want to get good marks, do what? Don’t do what?
Please call me if he comes next Sunday.
练一练：
1。如果她早点儿起床，就有时间在家里吃早餐 gets ____a up If she____ little earlier, she’ll have time to eat breakfast at home. 2。如果你参加聚会，你将会过得很开心。 join the party ,you_____ will have If you____ ____ a great time. 3。如果明天下雨，我们将不去野餐 won’t go for a picnic. If it rains ____tomorrow, we ___ ____ 4。如果你经常听英文歌，你将会喜欢英语 listen___English to will ___English. like If you often ____ songs, you___
If you drive too fast, you may have an accident. You must stop if the traffic is red. 3. 如果主句是祈使句，从句同样要用一般现在时。 Don’t go and play football if you don’t finish your homework.
She will be late.
will ___late. be If she walks _____ to school, she _____
If 引导条件状语从句
定义：if
“如果, 假如” 它引导的句子表示某事发生所需的 条件，即“在…条件下，某事才能发生”，在句子中充当状 语，因此称之为条件状语从句。（ If引导的条件状语从句表 示假如有从句的动作发生，就会有主句动作的发生 ）
goes 1.I’m sure if he _____(go) to the party, will have (have) a great time. he________ 2.If the rain _______(stop) tonight, we will go stops to the cinema. have 3.I’ll buy a computer if I ______(have) enough money. won’t get 4.You _________(not get) nervous if you do _____(do ) enough exercise. will come 6.I want to know if he _________(come) comes tomorrow, if he _______(come), I will give __________(give) the massage to him.
If条件句：条件句用于陈述语气，表示假设的情况可能发生，
其中 if 是“如果”的意思。
主句一般将来时 ，从句用一般现在时。
构 成 时 态 例 句
条件从句
If＋一般现在时 If he comes,
主
句
主语＋shall/will+动词原形 he will take us to the zoo.
用法：
位置：从句可放在主句之前或之后，但是放在主句之前须有
逗号隔开
eg:如果我有足够的钱，我就去环游世界 If I have enough money, I will travel around the world =I will travel around the world if I have enough money
1. 如果主句是一般将来时，从句则用一般现在时。
If it rains（从句）， I will stay at home. I’ll go with you if you don’t want to gmay, can 等情态动词，从句也要用
一般现在时。 If you drive too fast, you may have an accident. You must stop if the traffic is red. If you finish the homework， you can go home． 如果你作业做完了就可以回家了。 If you want to lose weight you must/should eat less bread. 如果你想减肥，你必须少吃面包。
If you play computer games on weekdays , you’ll be very tired in class your parents will be sad. you won’t get good grades . your eyes will be poor
She is going to walk to school.
• 3. 如果主句是祈使句，从句同样要用一 般现在时。 Don’t go and play football if you don’t finish your homework. Please call me if he comes next Sunday.
Revision
if条件状语从句结构及时态
1. 如果主句是一般将来时，从句则用一般现在时。
If it rains（从句）， I will stay at home. I’ll go with you if you don’t want to go alone（从句）. 2.如果主句含有must, may, can 等情态动词，从句也要用 一般现在时。
Fill in the blankets with the proper form
will stay 1.If It______ rains (rain) tomorrow, I ______(stay) at home. 2.You may ______ pass (pass) the exam if youstudy ___ (study) hard. press 3. If you want to record, ________(press) the red light.
Look and say If I’m ill, I will see a doctor __________________.
If I’m late, I will say sorry _________________.
Look and say If I’m hungry, eat some food I will______________.
• If you want to get good marks, __________. study hard