高中英语北师大版必修3 随堂演练 9-grammar 1

随堂演练及时体验巩固提升.单句语法填空(不多于3个单词)1You know, I _ (look) for a job for three months, and this is my first interview.答案have been looking2My sister _ (stay) in Beijing for three months last year.答案stayed3The little boy is dirty all over because he _ (play) in the mud all the morning.答案has played/has been playing4Here he is! We _ (wait) anxiously for him since last night.答案have been waiting5They _ (marry) for more than twenty years.答案5.have been married6 Did you find the missing couple in the mountain yesterday? No, but we _ (try) to get in touch with then ever since.答案与解析have been trying“从昨天到现在我们一直在努力与他们联系”，表示过去的动作延续到现在还在进行，用现在完成进行时。7We _ (work) on it for several hours but we have not yet reached any conclusion.答案与解析have been working根据but后时态，可以判断出到现在还没有得出结论，有可能还要继续下去，所以要用现在完成进行时。8 You havent got the textbook for my chemistry course yet.I know, and we _ (try) to get it for the last 5 weeks.答案与解析have been trying由for the last 5 weeks可知用完成时，再由上文“你还没有弄到化学教科书”，可以推测we一直到目前都在想办法，因此用现在完成进行时。9I wont tell the students the answer to the math problem until they _ (work) on it for more than an hour.答案have been working.请改正划线部分的错误1Sorry! Im late. How long had_you_been_waiting for me?_答案had you been waitinghave you been waiting2They have_been_knowing for about twenty years._答案have been knowinghave known3It began to rain four days ago. It rains for four days and hasnt stopped._答案rainshas been raining4I wondered if you are busy this weekend._答案wonderedwonder/am wondering5Look! Yo