情态动词
can; can’t; should; shouldn’t; must; may后一定加动词原形。
如：The girl can’t swim, but she can skate.
女孩不会游泳，但是会滑冰
Don’t talk in class, you should listen to the teacher carefully.
不要再课上说话，你应该认真听老师讲。
祈使句
肯定祈使句以动词原形开头；否定祈使句以don’t加动词原形开头。
如：Open the box for me ,please.
请为我打开盒子。
Liu Tao! Please get up earlier tomorrow.
刘涛，明天请早点起床！
Don’t walk on the grass!
不要在草地上走！
Helen! Don’t climb the tree,please.
海伦！不要爬树。
go的用法
去干嘛用go +动词ing
如: go swimming; go fishing;
go skating;go camping;go running;
go skiing;go rowing…
比较
than 前用比较级；as…as之间用原级。
如：My mother is two years younger than my father.
我妈比我爸年轻两岁。
Liu Tao jumps as far as Ben.
刘涛跳得和本一样远。
喜欢做某事
用like +动词ing或like+ to + 动原。
如：Su Yang likes growing flowers.
苏阳喜欢种花。
The children like to play with lanterns at Spring Festival.
孩子们喜欢在春节去玩花灯。
想要做某事
用 would like +to+动原或want + to +动原。
例：I’d like to visit the History Museum.=I want to visit the History Museum
some
用于肯定句中，在否定句和问句中改为any,但当表示委婉语气时仍用
如：Can I have some writing paper? Would you like some orange juice?
代词
人称代词主格做主语用一般放在句首或动词前，主格分别是 I you he she it we you they。
宾格做宾语用，一般放在动词或介词后
如：Open them for me. Let us …, join me等。
宾格分别是me you him her it us you them。
形容词性物主代词放在名词前，不能单独使用，分别是my your his her its our your their
名词性物主代词相当于形物加名词，它只能单独使用后面不好加名词，分别是mine yours his hers its ours yours theirs。
