语法填空之从句练习(含答案)

语法填空之从句

一、名词性从句

1.正确分析句子成分是做对题的关键。

2.连接词的特点：

that没有意义，在从句中只起连接作用，不充当句子成分；

whether, if 表“是否”，在从句中只起连接作用，不充当句子成分；

what, which, how, where, when, whatever等，有各自的意义，在从句中担任成分。

3. that 引导主语、表语、同位语从句时不省略；有多个that引导的宾语从句时，只有第一个that可省略；引导的宾语从句中含有从句时，也不省略。

4. 介词后一般不接that引导的宾语从句，此时需要用it作形式宾语；某些动词enjoy, hate, have, like, love, appreciate, take也不能接that引导的宾语从句，此时需要用it作形式宾语。

如：You may rely on it that he will come on time.

5. reason做主语时，表语从句只能用that引导。

6.doubt 在肯定句中其后的宾语从句常用whether, if 引导；doubt在否定和疑问句中其后的宾语从句常用that 引导。

如：There is some doubt ___whether_______ he will come tomorrow.

7. 与if相比较，whether 引导所有名词性从句，也可用于连接介词后的宾语从句，可以discuss, decide 后引导宾语从句，还可与or not 连用。

*考题检验

1. __________ Barbara Jones offers to her fans is honesty and happiness.

2. There is clear evidence ________ the most difficult feeling of all to interpret is bodily pain.

3. World Aids day is also important in reminding us that HIV has not gone away, and _______ there are many things still to be done.

4. News came from the school office _________ Wang Lin had been admitted to Beijing University.

5. I was close to being killed the other day. A car passed me at ________ I thought was a dangerous speed.

6. There is no doubt _________ John will support you.

7. Could I speak to ________ is in charge of International Sales please?

8. We have offered her the job, but I don’t know _________ she will accept it.

9. Twenty students want to attend the class that aims to teach ________ to read fast.

10. I am afraid he’s more of a talker than a doer, which is ________ he never finish anything.

11. As far as I can see, there is no possibility ________ he will win the tennis match this time.

12. American scientists have discovered that walnut trees can produce more than walnuts. The scientists say walnut trees also can make a chemical form of the popular pain-killing medicine aspirin. The trees do this under the stress of disease 1_________ other threats. Scientists say the chemical may help the trees reduce damage from dry weather, unseasonable temperature 2_______ other changes in the environment.

The results are important 3__________ presence of the chemical could warn growers early 4_____ a tree is in danger. Growers could recognize a problem 5________ leaves on walnut trees die and fall off. The scientists say the 6________(find) also show that a plant can communicate with other plants through the atmosphere. For example, a tree could communicate 7_______ it is under attack from insects. 8_______ that information, a grower could begin corrective treatment.

Researchers 9________(know) for a long time that laboratory plants may produce methyl salicylate, aspirin’s chemical form. Aspirin was first made from the bark covering on willow trees. 10_______ the researchers had never before found methyl salicylate in a forest. They have not confirmed that trees could emit, 11_______ give out, large amounts of the chemical into the atmosphere.

答案：1,what 2. that 3. that 4. that 5. what 6.that 7. whoever 8. whether/if 9. how 10. why 11. that

12(1. or 2. and 3, because/as/since 4. that 5. before 6. findings 7. when 8. With 9. have known 10. or 二、定语从句