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。 本文来源:https://www.wddqw.com/doc/6ac76f0c084e767f5acfa1c7aa00b52acfc79cf4.html