can, could, may, might, must 皆可表示推测，其用法如下： 　　1）情态动词 动词原形。 　　　　表示对现在或将来的情况的推测，此时动词通常为系动词。 　

One day, a philosopher（哲人） was having an important class in a famous university. 　　 He was an experienced professor. The students had expec

１．　名词　　?（1）　不规则名词的单、复数形式要特别记忆：　　?man—men, woman—women, child—children, foot—feet, tooth—teeth 　　?（2）　单数

Today is Tree-planting Day. 　　We went to plant trees in Daning Greenland. As soon as we arrived, we began to work.Some were digging holes, s

Unit 1A: Hello. What"s your name?B: My name"s Gina. A: I"m Jim. Nice to meet you. B: Nice to meet you, too.A: What"s your phone number?B: My phon

4.5副词及其基本用法 　 副词主要用来修饰动词，形容词，副词或其他结构。 一、副词的位置： 1） 在动词之前。 2） 在be动词、助动词之后。　 3） 多个助

Chae"s a fighter 　　SOUTH Korean pop singer Chae Yeon is known for her passion. Once a group of artists were invited to climb to the top of a mo

　　一、none无 　　1）none作主语，多与of构成短语noneof。在答语中，none可单独使用。 　　Arethereanypicturesonthewall?None. 　　2）none作主语，谓语