一般现在时态是表示经常发生的动作或者存在的状态。
1、一般现在时态的构成：
（1）肯定句的构成：
① 情态动词+动词原形：
He can speak French. 他会说法语。
② 由be的正确形式构成：
He is at home. 他在家。
③ 第三人称单数：三单现形式
He speaks French very well. 他法语说得很好。
④ 非第三人称单数：动词原形
I work hard. 我努力学习。
（2）疑问句和否定句的构成：
① 情态动词提前；情态动词+not
He can speak French. 他会说法语。
→ Can he speak French?
→ He can not speak French.
② Be提前；be后面加not
He is at home. 他在家。
→ Is he at home?
→ He is not at home.
③ 第三人称单数：Does+动词原形；doesn’t+动词原形。
He speaks French very well. 他法语说得很好。
→ Does he speak French very well?
→ He doesn’t speak French very well.
④ 非第三人称单数：在句首补充Do; 在谓语动词前补充don’t
I work hard. 我努力学习。
→ Do you work hard?
→ I don’t work hard.
【特别注意】
① They do their homework every day.
→误：They do not their homework every day.
→正：They don’t do their homework every day.
→误：Do they their homework every day?
→正：Do they do their homework every day?
② He does housework on Sunday.
→误：He does not housework on Sunday.
→正：He doesn’t do housework on Sunday.
→误：Does he housework on Sunday?
→正：Does he do housework on Sunday?
2、一般现在时态的用法：
（1）表示经常性或习惯性的动作或存在的状态。
He often sleeps late. 他经常睡懒觉。（经常的动作）
He is a PE teacher. 他是一个体育老师。（存在的状态）
（2）表示客观真理
He said that the earth is bigger than the moon. 他说地球比月亮大。
（3）在时间、条件等状语从句中，用一般现在时表示将来。
When he comes tomorrow, I’ll meet him at the station. 明天他来时，我要去车站接他。
If it rains tomorrow, we’ll stay at home. 如果明天下雨，我们就呆在家里。
（4）在某些以here，there开头的句子中，用一般现在时表示正在发生的动作。
Here comes the bus. 公交车来了。
（5）表示预先安排或计划好的事
The train leaves at 8:00 tomorrow morning. 火车明天早上8点出发。
（6）当要陈述一个客观事实时，即使有过去或将来的时间状语，也可用一般现在时：
My brother is 12 years old next year. 我弟弟明年12岁。
The story begins in the year 1937. 故事开始于1937年。
3、一般现在时常用的时间词语
★一般现在时态常与sometimes（有时），usually（通常），often（常常），always（总是），seldom（很少），every day(week，year)等连用。
★但是，这些时间词语只是辅助作用，它们也可用于一般过去时、现在进行时等其它的时态。如：
At that time, I often got up early. 那时候，我经常很早就起床。（一般过去时态）
My father is always losing his key.我爸爸总是丢钥匙。（现在进行时态）