problme可数？
解释为困难时不可数。如 This thorny problem on the environmental protection floored the new mayor.这个关于环境保护的棘手难题把新任市长难住了。“countable noun 可数名词”。Measures have been t...
a plenty of
A没有这个表达！A只有PLENTY OF 注意了 这个经常在改错中出现。a plenty of、a large deal of和a good supply of 在多数情况下修饰不可数名词，如：a plenty of water, a geat deal of time，不过它们也可以修饰可数名词，...
describe的名词形式是discription还是description
[例句]Police have issued a description of the man who was aged between fifty and sixty. 警方已经发布了那名年龄在50到60岁之间的男子的相貌特征通告。description作“种类,类型”解时是可数名词。...
明天考，帮我啊
一般说 i had a wonderful time yesterday,此的time 为一段时光 ,可数名词,变为感叹句得用what 修饰, 而不是how. 如果把wonderful改为good,那么have a good time是不是很熟悉呢?所以这里的time前要加a....