一般现在时讲解及练习.doc

文档介绍：一般现在时
一般现在时的基本意义表示发生在包括讲话时间在内的工作或状态。
基本用法:
一、表示经常性或习惯性的动作。
We usually get up at six every morning.
Bill often goes to school by bike.
二、表示现在的特征或状态。
Australians speak Australian English.
She is tall and she has a round face.
The boy is twelve years old this year.
There are 66 students in our class.
三、表示客观真理、科学事实、格言及其他各种不受时间限制的客观存在状况。
One plus one is two.
Light travels faster than sound.
The earth turns round the sun.
A friend in need is a friend indeed.
注:一般现在时的其他用法请参考有关语法书。
一般情况下一般现在时常用的时间状语:sometimes, often, usually, every day(week, year…), on weekdays, on Sundays(Mondays, Tuesdays…), at weekdays, from morning to night, in the morning, in the afternoon, in the evening, at night,
四、一般现在时的类型:
1. 由“be”构成,如:
(1).I____a teacher. 我是一名老师。
(2). The desk ___ here. 那张桌子在这儿。
(3). You ____ students. 你们是学生。
2. 由“情态动词”can may must 等构成,如:
(1) I ____ speak English. 我会说英语。
(2) You _____ go home now. 现在你可以回家了。
(3) She _____ _____at home on Sundays. 星期天她必须呆在家里。
3. 由“实意动词”构成,分A B两种情况。如:
A当主语是第三人称单数(指he she it Tom ...)时,句中的动词用“第三人称单数形式”。如:
(1) He often up at 6:00. 他经常在六点起床。
(2) She _____to school at 6:30. 她在六点半到学校。
(3) It four legs. 它有四条腿。
(4) Tom home at 8:00 in the evening. 汤姆在晚上八点回家。
(5) Her mother Japanese. 她妈妈喜欢日语。
B 当主语不是第三人称时,句中动词用原形。如:
(1) You ______ playing basketball. 你们喜欢打篮球。
(2) We often _______ at home on Sunday. 星期天我们经常呆在家里。
(3) The girls __