Life in the future（The Fifth Period）

3.the subordinate conjunction“wheth-er”can introduce all the noun clau-ses，while the subordinate conjunc-tion“if”can only introduce an ob-ject clause used as the object of a verb.for example，we can’t say“it all depends on if they will support us”.we should say“it all depends on whether they will support us”.
4.the subordinate conjunction“that”has no meaning and doesn’t act as any omponent in the noun clau-ses.when“that”is introducing a noun clause as the object of a verb(believe，consider，hear，know，say，understand etc)，it can be omitted.
5.the conjunctive pronoun“what”means“the thing that/all that”in the noun clauses.“what”intro-duces a noun clause.at the same time it can be used as the subject，the object or the predicative in the noun clause.you must pay atten-tion to the differences  between“that”and“what”.now let’s look at these sentences on the screen.
that she was closed made us very happy.
what he did quite surprises us.
this is what interests me most.
the reason was that he had never seen her before.
stcp ⅳ practice and consolidation
t：now you have known something about the noun clauses.let’s do some exer-cises so that we can use them correctly and freely.please look at the screen.
i.correct the following sentences
1.the news which our team had won pleased everyone.
2.i don’t doubt whether he can work out the problem.
3.i have been worrying about if i have hurt her feeling.
4.i don’t know that he wants.
5.the reason why he didn’t come is because he was ill.
6.who walks around in such a heavy rain will catch a cold.
7.i think important that we learn english well.
8.it’s not certain that the sports meet will be held.
9.this is the suggestion which we have a trip the day after tomor-row.
lo.china is a great socialist country is well known.
suggested answers：
1.which→that    2.whether→that
3.if→whether    4.that→what
5.because→that  6.who→whoever
7.important→it important
8.that→whether
9.which→that
10.china→that china
ⅱ.choose the best answers
1.the photographs will show you_________.
a.what does our village look like
b.what our village looks like
c.how does our village look like
d.how our village looks like
2.i still remember________this used to be a quiet place.
a.when             b.how
c.where            d.what
3.________he said at the meeting as-tonished everybody present.