注意if 条件句的时态搭配1if从句用一般现在时，主句用一般将来时 If he runs， hell get there in time. 如果他跑，他就会及时赶到那儿。The cat will scratch you if you pull her tail. 如果你拉猫的尾巴，它就会抓你。2if从句用一般现在时，主句用may/might/canIf the fog gets thicker ，the plane may/might be diverted. 如果雾在大一些，飞机可能就会改在别的机场降落。If it stops snowing ，we can go out. 如果雪停了，我们就可以出去。3if从句用一般现在时，主句用must/shouldIf you want to lose weight ，you must/should eat less bread. 如果你想减肥，你必须少吃面包。4if从句用一般现在时，主句用一般现在时If you heat ice， it turns to water. (也可用will
