Memory 引导条件状语从句的连词 if ( 假如 ; 如果 ) e. g. If you ask him, he will help you.If it is fine tomorrow, we shall have a picnic.I will tell him about it if he comes back.If she gets the news, she will ring me up.Notes:if 条件状语从句通常用一般现在时态，主句用的是将来时态 . 其动作的结果可能发生。A if sentences: ( 动作的结果是可能发生的， if 从句动词的时态用一般现在时，主句用一般将来时 ).Example: 1.If it________(rain )tomorrow, we __________(go )to the zoo.2. If we _______(practise) speaking English every day, we _________(improve)it soon.3. You ______(be)hungry if you ______(not eat) much food.rainsWill gopractiseWill improveWill be don’t eatIf…not = unlessIf you don’t leave now, you will be late for school. Unless you leave now, you will be late for school.1.If you don’t work harder, you will fail the exam._______________________, you will fail the exam.2. If it doesn’t rain tomorrow, we will have a football match._________________________________, we will have a football match.Unless you work harderUnless it rains tomorrow if ( 如果…） ,when ( 当……时候） unless( 除非… ) and until （直到……）When she came into the room, she saw no one.. You cannot go to bed until you finish your homework.1.You don’t work harder.You will fail the exam._______________________, you will fail the exam.2. It doesn’t rain tomorrow. We will have a football match._________________________________, we will have a football match.If you don’t work harderIf it doesn’t rain tomorrow if ( 如果…） ,when ( 当……时候） unless( 除非… ) and until （直到……）3.You can’t get there on time .You take a taxi._______________________, you can’t get there on time .4.You will fell tired. You have a rest . You will be tired __________...
