1) 有些动词用一般现在时代替完成时：hear, tell, learn, write , understand, forget, know, find , say, remember. I hear (= have heard) he will go to London. I forget (=have forgotte
1 )“书上说“，“报纸上说“等。 The newspaper says that it's going to be cold tomorrow. 报纸上说明天会很冷的。 2) 叙述往事，使其生动。 Napoleon's army now a
时间状语从句，条件句中，从句用一般现在时代替将来时When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, th
1) 概念：表示将来某时进行的状态或动作，或按预测将来会发生的事情。 She'll be coming soon. I'll be meeting him sometime in the future.注意：将来进行时不用
1） 概念：表示过去某时正在进行的状态或动作。2） 过去进行时的主要用法是描述一件事发生的背景；一个长动作发生的时候，另一个短动作发生。3)
1) 事实状态的动词have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continueI have two brothers.This house belongs to my sister. 2) 心理状态的动词Kno
现在进行时的基本用法： a. 表示现在( 指说话人说话时) 正在发生的事情。 We are waiting for you. b. 习惯进行：表示长期的或重复性的动作，说话时动
当主语后面跟有with, together with, like, except, but, no less than, as well as 等词引起的短语时，谓语动词与前面的主语一致。 The teacher together with some students
1）当there be 句型的主语是一系列事物时，谓语应与最邻近的主语保持一致。 There is a pen, a knife and several books on the desk.. There are twenty boy-students and twent
Reading and writing are very important. 注意： 当主语由and连结时，如果它表示一个单一的概念，即指同一人或同一物时，谓语动词用单数，and 此时连接的