三、动词的主要时态

　　(一)一般现在时

　　一般现在时表示经常性或习惯性的动作、现在的特征和状态、普遍真理等。

　　Galileo said the earth moves around the sun.

　　一般现在时的谓语形式：

　　1.当动词为实义动词，如read, go, look时，谓语用动词原形，否定句在动词前面加do not ，疑问句加助动词do 。常和always, often, usually, sometimes, everyday等表示时间的状语连用。

　　I go to school everyday.

　　I read the newspapers after lunch.

　　Do you agree with me?(agree with sb. 同意某人观点)

　　I don't quite agree with you.

　　主语为第三人称单数时，动词后面一般加s(具体变化规则与名词变复数相同)。否定句加does not, 疑问句加does .

　　My father gets up at six everyday.

　　He loves sports.

　　Does it hurt?

　　Does Miss Wu teach us English?

　　The machine doesn't run smoothly.

　　2.当动词为be时，谓语随人称和数的不同用am, is, are 三种形式。

　　One is not guilty until he is proved. 在被证明有罪之前， 人都是无罪的。

　　Knowledge is power.知识就是力量。

　　She isn't afraid to go to school alone now.

　　Are you from Yunnan?