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详解 ago 与 before 的语法难点
1. before 仍是 ago?
要说:
I came to Manchester two weeks ago.I came to Manchester two weeks ago.
不要说:
I came to Manchester before two weeks. Use “past time + ago" ago 用于一般过去时,比如:
10 years ago, a long time ago, a few weeks ago, a couple of days ago Use "before + action / event"
before 用于动作或事件前,比如:
before you left, before we start, before lunch 2. fall 仍是 reduce?
These two words are the opposites of 'rise' and 'raise': 它们是 rise 和 raise 的反义词: something falls (e.g. the price fell)
somebody reduces something (e.g. the company reduced the price) You will probably use 'fall' to describe numbers on a graph or chart
for IELTS Writing Task 1:
在雅思短作文中,你能够用
fall 来描绘图表里的数字。
In 20XX 年, the number of customers fell. (verb, past)
这里的 fall 是动词,过去时。
There was a sharp fall in Internet usage. (noun) 这里的 fall 是名词。
'Reduce' and 'reduction' are probably more useful for Writing Task 2: reduce 和 reduction 在长作文中更实用:
We need to reduce the amount of pollution from exhaust fumes. (verb)
reduce ,动词。
Recycling leads to a reduction in waste. (noun) reduction ,名词。
3. because 仍是 because of?
Compare these two sentences:
比较以下两个句子:
I stayed at home because the weather was bad. I stayed at home because of the bad weather.
The important difference is the use of the word 'was' in the first sentence. After 'because', you need a subject and a verb (e.g. the weather was). After 'because of', we don't use a verb, only a noun, nouns or noun phrase.
重要的差别在于第一句里使用了 word 。 Because 后边需要加主语和
动词 (比如 the weather was) 。 Because of 后边不需要动词,只需一个或多
个名词,又或许名词词组就能够了。
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