详解ago与before的语法难点
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详解ago与before的语法难点
1. before还是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,例如:
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,例如:
before you left, before we start, before lunch
2. fall 还是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,你可以用fall来描述图表里的数字。
In 2008, 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在长作文中更有用:
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还是because of?
Compare these two sentences:
比较下列两个句子:
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 dont use a verb,
only a noun, nouns or noun phrase.
重要的区别在于第一句里使用了word。Because后面需要加主语和动词(例如the weather was)。Because of 后面不需要动词,只要一个或多个名词,又或者名词词组就可以了。