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go---goes pass---passes
（3）以“辅音字母加 - y”结尾的动词，要先变y为i再加-es.
try---tries study---studies cry---cries fly---flies
2.不规则变化：
be---- is are have----has
二、一般现在时用法
1. 表示经常性，习惯性,永久性的动作或存在的状态.通常与副词sometimes, often, usually, always, every day (year, month ), once (twice, three times) a day,等时间状语连用。
They usually go to school by bike.
I take the medicine three times a day.
I take the medicine three times a day.
She helps her mother once a week.
Mary’s father is a policeman.
There are 50 students in my class.
2. 表示客观真理，科学原理，自然现象，等客观事实或格言，谚语等。
The sun rises in the east and sets in the west every day.
The man who has never been to the Great Wall is not a real man.
Tomorrow is Tuesday.
三、一般现在时的句子转换：
（1）当句子中有be动词或情态动词时，则把be动词或情态动词(can,could等等)提到主语的前面变成疑问句;在be动词或情态动词后面加not变成否定句.
例：①陈述句：She is a student.
疑问句→ Is she a student?
否定句→ She is not a student. ②陈述句：I can swim.
疑问句→ Can you swim
否定句→ I can not swim.
（一）．用动词的适当形式填空
1. She _________(go) to school at seven o’clock.
2. It’s 6 o’clock. They are _________ (eat) supper.
3. He usually ___________ up at 17:00.(get )
4. She ___________ (live) in Beijing.
5. Amy _________ (be) here just now.