随着报名AEAS考试培训的人数逐年增加，AEAS考试竞争也越来越激烈。AEAS真题模拟成绩成了制胜的法宝。这次为大家介绍的是比较结构用法归纳。

1. as…as的用法特点

其间只能接形容词与副词的原级，不能用比较级和最高级。有时该结构可受 (not) nearly, almost, just, nothing like, exactly, not quite, half, one-ten, twice, three times, 30 per cent等的修饰，注意这些修饰语必须置于第一个as之前，而不能置于其后。如：

The dining-room is twice as big as the kitchen. 餐厅是厨房的两倍大。

At best we can do only half as much as last year. 我们最多能完成去年工作量的一半。

注：该结构中的形容词有时还可修饰另一名词，但这个名词应带有不定冠词(注意词序)。比较：

She is as good a cook as her mother.= She is a cook as good as her mother. 她和她妈妈一样是位好厨师。

2. more and more的用法特点

其意为“越来越……”，其后可接修饰名词(不可数名词或复数名词均可)，也可修饰形容词、副词、动词、介词短语等。如：

More and more people are concerning themselves with environmental problems. 越来越多的人关心环境问题。

The little girl is growing to be more and more like her mother. 这个小姑娘长得越来越像她妈妈了。

As time went on, he found it more and more difficult to support his family. 他日渐发觉要养活一家人是越来越难了。

3. more or less 的用法特点

基本意思是“或多或少”、“在一定程度上”、“大体上”、“大约”等。如：

The job is more or less finished. 工作大体上完成了。

His condition has more or less improved. 他的情况多少有些改进。

The repairs will cost $50,more or less. 修理费大约要50美元。

注：在否定句中可表示“一点也不”。如：

I didn"t understand it, more or less. 我一点也不懂。