1.difficultyn.困难，艰难，难事；有可数名词和不可数名词两种用法
①用作不可数名词，意为"困难、艰难"，常用在以下句型中
have no/find(some, any, much) difficulty withsth./(in) doing sth.
There is no(some, any, much) difficulty (in) doing sth.
I had no difficultyin learning English.
There was much difficulty (in) explaining it to him.
②用作可数名词，表示具体的困难，意为"难事，难点，困境，难处"。
This book is full of difficulties.
In face of so many difficulties, we never appeared to beafraid.
情态动词特殊用法大集合情态动词除了基本的用法以外还有许多特殊之处，最基本的用法读者可以结合自己的语法书籍来适当复习，这儿就不赘述，主要略列一些特殊用法，希望对各位英语爱好者有所帮助。1． can和could⑴Can 和 could可以表示某
1. 不定式的用法------1.1 不定式作主语不定式作主语，往往用it作形式主语，真正的主语不定式放至句子的后面。例如：It's so nice to hear your voice. 听到你的声音真高兴。It's necessary for you to lock the car when you do not use
介词"to"的用法总结一：表示相对，针对be strange (common, new, familiar, peculiar, distinct, sensitive, immune, vulnerable, indispensable) toAir is indispensable to life.Aircrafts are vulnerable to interference caused by
be动词，情态动词，助动词do/does的用法区别及练习1.由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如：肯定句:He is a student.一般疑问句: Is he a student
Lest和For fear that等同义结构的用法一、连词lest引出目的状语从句，谓语中包含should（体现虚拟语气），并且还可省略。1. Please remind me of it again tomorrow lest I (should)forget.明天请再提醒我一下，免得我忘记。2. He runs fa
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