1、if 引导的条件状语从句用 法 例 句 主句为一般将来时态，if 从句用一般现在时态（即主将从现）。We will stay at home if it rains tomorrow.如果明天下雨，我将要呆在家。 主句中含有情态动词，if 从句用一般现在时态。If you finish your homework, you can go home now. 如果你做完了作业，你现在可以回家了。 主句为祈使句，if 从句用一般现在时态。Dont jump into the river if you feel very hot. 如果你感到很热，不要跳入河里。 主句为过去将来时，if 从句用一般过
2、去时态（如果涉及到 be动词，一律都用 were）。此时，表达的是和现实相反的推测，用虚拟语气。If I were you, I wouldnt do it like that.如果我是你，我就不会那么做的。If you gave me some money, I would be very happy. 如果你给我一些钱，我就会很高兴的。【边学边做】用括号内所给词的正确形式填空。1. What will you buy if you _（have ）a lot of money?2. If it _（not snow）tomorrow, we will feel unhappy.3. You
3、 mustnt go to school if you _（be ）still in bed.4. If he _（be）at home at that time, he would know it.5. Please show me the way if you _（know）it.6. You will hurt your teeth if you _（eat）too much candy.7. If you gave me a toy car, I _（be）very happy.8. I would get the prize if I _（work）hard. 将下列句子翻译成英语。
4、1. 如果明天不下雨，我就和同学们去野餐。2. 如果周日你去购物的话，我就去。3. 如果你想减肥 （lose weight），就锻炼身体吧。4. 如果冬天来了，春天还会远吗？5. 如果可能的话，我就去火车站接你。Key：1. If it doesnt rain tomorrow, I will have a picnic with my classmates. 2. I will go shopping on Sunday if you do. 3. Take some exercise if you want to lose weight.4. If winter comes, can spring be far behind? 5. If (it is) possible, Ill meet you at the train station.
