例A：I study very hard and Tom studies very hard, too.
（我很用功，汤姆也很用功。）
例B：The teacher is not in the classroom and the students are very noisy.
（老师不在教室，学生都很吵闹。）
解说 如例所示主语为第三人称单数时，一般现在时的动词必须使用第三人称单数形式，其他则除“be”以外都使用动词原形 (Root Verb)。 一般现在时的用法如下：
解说 文法上一般现在时所指的“现在(at the time of speaking)”其实其观念并非是绝对的。这里所指的现在是在表明说话时存在着的事物，其时间领域含盖着过去，也将延伸及将来。例如：It is very hot today.（今天天气很热。---如说话时间是在中午，本句话是在表明说话时“天气很热”，实际上“天气热”的现象在中午之前就已开始存在，同时也将延伸到下午。）
例：Dogs bark at strangers.（狗看到陌生人就会吠。──这句话是在谈狗的习性，说话时不一定有狗正在吠，而狗的这种习性可以追溯及远古，当然也将延伸到将来。） 因此，一般现在时所指的“现在”可以图示如下：
一般现在时常可用时间副词如“today，this + time (this week, this year, …)，now，right now，at present，etc.”来修饰。
△动词第三人称单数的规则变化
1. 一般情况：加-s 例：reads，writes，says
2. 以s，x，ch，sh和部分以o结尾的词加-es 例：teaches，washes，guesses
3. 以辅音字母+y结尾的词变y为i再加-es 例：try—tries，carry—carries.
☆☆☆[一般现在时的用法] 简述
1) 经常性或习惯性的动作，常与表示频腮度的时间状语连用。 时间状语： every…, sometimes, at…, on Sunday I leave home for school at 7 every morning. 2) 客观真理，客观存在，科学事实。 The earth moves around the sun. Shanghai lies in the east of China. 3) 表示格言或警句中。
Pride goes before a fall. 骄者必败。
注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。 例：Columbus proved that the earth is round.. 4) 现在时刻的状态、能力、性格、个性。 I don't want so much.
Ann Wang writes good English but does not speak well. 比较：Now I put the sugar in the cup. I am doing my homework now. ☆☆☆巩固练习：
Ⅰ．请把下列各题的主语改为第三人称单数，并作其他必要的表达变化。 1．I teach English in a junior high school.（he）
2．I study English every day.(she)
3．I pass by the post office every morning. （he）
4．I read and write both English and Chinese every day. (she)
5．I have two sisters and one brother. （he）
6．I go to school and come home on a bicycle every day. (she)
7．I wash my hands before I eat something. （he）
8．I don't know her very well. (she)
9．I always try my best when I am told to do something. （he）
10．On weekdays I always get up at 6：00 . Then I do my bed, brush my teeth, wash my face, and get everything ready in half an hour. At 6：30 I have my breakfast with my parents and sisters and leave for school at 6：50. (he)
Ⅱ．请把下列动词选填到各题空格处。（可以重复选用）
（be, begin, belong, cook, cry, do, feel, go, have, help, keep , make, mean, rain, understand ）
1．My father （1）______ to work by bus every morning . 2．（2）______ you （3）______ what （4）______?
3．The summer vacation usually （5） ______ on July 1 in most schools. 4．We often （6）______ swimming in summer. 5．A baby （7）______ when it （8）______ hungry.
6．Everyone （9）______ happy and （10） ______ a good time during the Chinese New Year. 7．In autumn it （11）______ not （12）______ very often in this part of the country. 8．The two little cats （13）______ to my aunt, She （14）______ them as her pets.
9．In my family, my mother always （15）______ the meals and my father （16）______ the dishes. But when they （17）______ very busy, I often （18）______ them in the kitchen.
10．My bicycle often （19）______ some strange noises, I wonder if something （20）______ wrong with it.
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