Unit 6 Enjoying Cycling Topic 2 Grammar语法 时间状语从句-2023-2024学年八年级英语下册单元语法精讲精练（仁爱科普版）

Unit 6 Enjoying Cycling Topic 2 时间状语从句 （时间：60分钟，满分：100分） 时间状语从句是由表示时间的从属连词或短语引导的从句，表示主句动作发生的时间,在整个复合句中作状语。 1. when引导的时间状语从句 表示主句的动作和从句的动作同时发生，或主句的动作发生在从句的动作之前。如: It was raining when we arrived. 我们到达时，天正下着雨。 2. as引导的时间状语从句 表示“当.....时”，“一边...,一边...”。主句和从句的动作同时发生,强调伴随情况。如: She went out as I entered the room. 在我走进房间时，她走了出去。 3. while引导的时间状语从句 表示“在....过程中”,强调某一时间段内主句和从句中的谓语动作同时发生，或主句的动作发生在从句动作的过程中。如: While I was walking down the  street,  I saw a UFO. 我在街上散步时,看见了飞碟。 4. before引导的时间状语从句 表示主句的动作发生在从句动作之前。如: Turn off the light before you go out. 出去前要关灯。 5. after引导的时间状语从句 after引导的从句则表示主句动作发生在从句动作之后。如: I went to bed after I finished my homework. 我完成了家庭作业以后才去睡觉。 6. as soon as 引导的时间状语从句 表示从句的动作一旦发生 ，主句的动作就会发生或可能会发生。如: I' ll write to you as soon as I get to Beijing. 我一到北京就写信给你。 7. till/ until引导的时间状语从句 必须注意,由 till/ until 引导时间状语从句时，如果主句是肯定结构，表示主句动作“一直持续到从句动作发生为止”;如果主句是否定结构，则表示主句动作“直到从句动作发生时才发生”。所以在肯定结构中，till/ until意为“到...为止", 而在否定结构中则意为“直到....才”。如: Please wait here until  I come back. 请在这儿等我，直到我回来。 She didn't go to bed till/ until she finished all the work. 她直到做完所有的工作才去睡觉。 1、 单项选择(本大题共50小题，每小题2分，共100分) 1．To prevent the disease, we should wash hands more carefully we have meals. A．before B．after C．until 2．—Your son was off school yesterday. How is he now? —The doctor told him to stay in bed ________ he feels better. A．though B．because C．and D．until 3．—Judy, you look so tired! —Yes, I did not go to bed ________ it was twelve last night. A．when B．as C．until D．after 4．I have to get up ________ my alarm clock goes off. This is one of my family rules. A．as far as B．as long as C．as soon as D．as quick as 5．The bus didn’t start __________ everybody got on. A．because B．since C．while D．until 6．We never know the love of the parents ________ we become parents ourselves. A．because B．when C．if D．until 7．At the New Year party, Lucy was singing ________ Lily was dancing. A．when B．while C．after 8．—Mum, I will keep on my dream ________ I make it come true. —Good boy! I believe you will be succ