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1、Unit 2单元语法精讲与精练单元语法精讲宾语从句（一）由 that，if 或 whether 引导的宾语从句1.宾语从句的定义当用一个句子充当宾语时，我们把这个句子叫做宾语从句。2.宾语从句的引导词(1)如果宾语从句是由陈述句转变而来，其引导词用that。that 本身无意义，可省略。eg： They are good doctors.He tells us. He tells us (that)they are good doctors他.告诉我们他们是好医生。(2)如果宾语从句是由一般疑问句转变而来,其引导词要用if/whether,意为“是否”。eg： Mr.Chen asks,“ A
2、re you all here?” Mr.Chen asks if/whether we are all here陈.老师问我们是否都到了。3.宾语从句的语序宾语从句无论是由一般疑问句转变而来，还是由特殊疑问句转变而来，在转变为宾语从句后 ,都要用陈述句语序。eg： Does Jim s father work here?Do you know? Do you know if Jim s father works here?你知道吉姆的父亲是在这里工作吗？【注意】当与 or not 连用时，只能用whether。4.宾语从句的时态第 1页(1)如果主句是一般现在时或一般将来时,从句的时态可根据
3、具体情况来确定。eg： I hear that he will be back in a day我.听说一天后他将回来。I think she finished her work an hour ago我.认为她在一小时前完成了工作。(2)如果主句的时态是一般过去时，从句的时态则相应地使用过去的某种时态。eg:He said that he didn t find your lost pen.他说没找到你丢失的钢笔。The policeman asked him if he was doing his homework at midnight yesterday.警察问他昨天半夜是不是在做作业
4、。(3)如果宾语从句所叙述的是客观真理、自然现象、名言警句或谚语等，不管主句是什么时态，从句都用一般现在时态。eg:Our teacher told us that the earth goes around the sun.老师告诉我们地球绕太阳转。My father said(that) knowledge is power.父亲说知识就是力量。单元语法精练一、用所给动词的正确形式填空。1.We are sure that he(go) to school tomorrow.2.Our father said that he(will) buy a new computer.3.I hea
5、r that he(swim) in the sea yesterday.4.I asked if he(can) hike to the top of the mountain.5.I m not sure whether there(be) some animals in the zoo.二、用 that,what,how,if 或 whether 填空。1.Wang Hong toldshe was cooking at 6:00 yesterday morning.2.I wonderI can get some advice from you.3.I don t knowor not
6、 they will come for our help.第 2页4.useful the iphone 6 is! But I cant afford it.5. a wonderful talent show they performed in our school yesterday!6.nice children Simon and Jim are!They help Mrs.Li clean the houseevery day.7.Our geography teacher saidthe earth goes around the sun.8.His father is worried abouthe lost his work.9.an exciting basketball match!Miami Heat beat New York Knicks at last.10. good advice they gave us!参考答案：一、1. will go/is going2. would3. swam4. could5. are二、1. that2. if/whether3. whether4. How5. What6. What7. that第 3页8. whether9. What10. What第 4页