语法针对外国学生
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Contents: 15.Gerunds
and Infinitives
16.Coordinating Conjunctions
17.Adverb
Clauses
18.Clauses
to Modifying Adverbial Phrases
19.Connectives with transitions 20.Conditional
Sentences and Wishes
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19-1
Connectives That Express Cause
and Effect, Contrast, and Condition |
|
Using Because
of and Due to |
|
(a) Because the weather was cold,
we stayed home. |
Because
introduces an adverb clause; it is followed by a subject
and verb, as in (a). |
(b) Because of the cold weather, we stayed
home.
(c) Due to the cold weather, we stayed
home. |
Because
of and due to are phrasal
prepositions, they are followed by a noun object, as in
(b), (c). |
|
(d) Due to the face that weather was cold,
we stayed home. |
Sometimes,
usually in more formal writing, due to is
followed by a noun clause introduced by the fact
that. |
(e) We stayed home because of the cold
weather.
We stayed home due to the cold weather.
We stayed home due to the
fact that the weather was cold . |
Like adverb
clauses, these phrases can also follow the main clause,
as in (e). |
|
19-2 Using
Transitions to show cause and effect: Therefore
and consequently |
(a) Al failed the test because he didn't study.
(b) Al didn't study. Therefore, he failed
the test.
(c) Al didn't study. Consequently, he
failed the test. |
Positions of
A Transition. (a), (b), and (e) have the same meaning.
Therefore and Consequently
mean "as a result." In grammar, they are called
transitions ( or conjunctive adverbs). Transitions
connect the ideas between tow sentences. |
(d) Al didn't study. Therefore, he failed
the test.
(e) Al didn't study. He, therefore, he
failed the test.
(f) Al didn't study. He failed the test,
therefore.
Positions of
A Transition.
transition + S + V (+ rest
of sentence)
S + transition +V (+ rest of sentence)
S + V (+ rest of sentence) +
transition
(g) Al didn't study, So he failed
the test.
|
A transition
occurs in the second of two related sentences. Note the
patterns and punctuation in the examples. A period (not
a comma) is used at the end of the first sentence. The
transition has several positions in the second sentence.
The transition is separated from the rest of the
sentence by commas.
Compare: A transition (therefore) has several possible
positions within the second sentence of the pair, as in
(d), (e), and (f). A conjunction (so) has only one
possible position: between the two sentences. So cannot
more around in the second sentence as therefore can. |
|
19-3
Other ways of
Expressing Cause and Effect: Such... That and
So... That |
|
(a) Because the weather was nice, we went to the zoo.
(b) It was such nice weather that we went
to the zoo.
(c) The weather was so nice that we went
to the zoo. |
Examples (a), (b) and (c) have same meaning. |
(d) It was such good coffee that I had
another cup.
(e) It was such a foggy day that we
couldn't see the road. |
Such...that encloses a modified noun:
Such + adjective + noun + that |
(f) The coffee is so hot that I can't
drink it.
(g) I'm so hungry that I could ear a
horse.
(h) She speaks so fast that I can't
understand her.
(i) He walked so quickly that I couldn't
keep up with him. |
So...that encloses an adjective or adverb:
So + adjective or adverb + that |
(j) She made so many mistakes that she
failed the exam.
(k) He has so few friends that he is
always lonely.
(l) She has so much money that she can buy
whatever she wants.
(m) He had so little trouble with the test
that he left twenty. |
So...that is used with many, few,
much, and little. |
(n) It was such a good book (that) I
couldn't put it down.
(o) I was so hungry (that) I didn't wait
for dinner to eat. |
Sometimes, primarily in speaking, that is
omitted. |
|
19-4
Expressing purpose: Using so that |
(a) I turned off the TV in order to enable my
roommate to study in peace and quiet.
(b) I turned off the TV so (that) my
roommate could study in peace and quiet.
|
In
order to expresses purpose. In (a): I turned off
the TV for a purpose. The purpose was to make it
possible for my roommate to study in peace and quiet.
So that also expresses purpose. It
expresses the same meaning as in order to.
The word "that" is often omitted, especially in
speaking. |
So That + can or could:
(c) I'm going to cash a check so that I can
buy my textbooks.
(d) I cashed a check so that I could buy
my textbooks.
|
So that
is often used of in order to when the idea of ability is
being expressed. Can is used in the adverb
clause for a present/future meaning.
In (c): So that I can buy = in order to be able to
buy.
Could is used after so that in past
sentences. |
So that + will/simple present or would:
(e) I'll take my umbrella so that I won't get
wet.
(f) I'll take my umbrella sot that I don't get
wet.
(g) Yesterday I took my umbrella so
that I wouldn't get wet.
|
In (e): So
that I won't get wet = in order to make sure that I
won't get wet.
In (f): It is sometimes possible to use the simple
present after so that in place of
will; the simple present expresses a future
meaning.
Would is used in past sentence; as in (g). |
|
19-5
Showing Contrast (Unexpected Result) |
Adverb Clauses: even though, although, though
(a)
Even though it was cold, I went swimming.
(b) Although it was cold, I went swimming.
(c) Though it was cold, I went swimming. |
Conjunctions: but... anyway, but...still, yet...still
(d) It was cold, but I went swimming
anyway.
(e) It was cold, but I still
went swimming .
(f) It was cold, yet I still
went swimming . |
Transitions: nevertheless, nonetheless,
however...still
(g)
It was cold. Nevertheless, I went swimming . (h) It was
cold; nonetheless, I went swimming .
(i) It was cold. However, I
still went swimming . |
Preposition: despite, in spite of, despite the fact
that, in spite of the face that
(j) I went swimming despite the
cold weather. (k) I went swimming in
spite of the cold weather. |
|
|
|
19-6
Showing
Direct Contrast |
Adverb Clauses: while, whereas
(a) Mary is rich, while John is poor.
(b) Mary is rich, whereas John is
poor.
(c) Whereas Mary is rich, John
is poor. |
Conjunction: but
(d) John is poor, but Mary is rich. |
(e)
Mary is rich, however, John is poor.
(f)
John is poor; Mary is rich, however.
(j)
Mary is rich. John, on the other hand,
is poor. |
|
19-7
Expressing
Conditions: Using otherwise and or (else) |
Adverb Clause:
(a) If I don't eat breakfast,
I get hungry.
(b) You'll be late if you don't
hurry.
(c) You'll get wet unless you take you
umbrella.
|
If and unless state
conditions that produce certain results. |
Transition:
(d) I
always eat breakfast. Otherwise, I get
hungry during class.
(e)
You'd better hurry. Otherwise, you'll be
late.
(f)
Take your umbrella. Otherwise, you'll get
wet. |
Otherwise expresses the idea "if the opposite is
true, then there will be a certain result."
In (d):
otherwise = if I don't eat breakfast. |
Conjunction:
(g) I always eat breakfast, or (else) I get
hungry during class.
(h)
You'd better hurry, or (else) you'll be late.
(i) Take your umbrella, or (else) you'll get wet. |
Or else
and otherwise have the same meaning.
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