四大时态

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四大时态 一般现在时

知识要点：

一、一般现在时的概念：

1、表示经常性的动作或现在的状态。 例：He gets up at six every morning. The boy is ill.

2、表示现在的能力、特征、职业等。 例：She dances well.

My mother teaches English. 3、表示普遍真理或客观事实。 例：Summer comes after spring. The sun rises in the east. 二、一般现在时的结构：

1、句式结构：主语+谓语动词（动词原型或动词第三人称单数）+其他成分 例：I go to school by bike. She goes to school by bus.

三、动词第三人称单数变化规则： 1、一般在动词后加s

例：play-plays swim-swims jump-jumps 2、以s, x, ch, sh, o结尾的单词加es

例：guess-guesses mix-mixes watch-watches wash-washes go-goes do-does 3、以辅音加y结尾的单词，去y为i再加es 例：fly-flies worry-worries carry-carries 注意：have 的第三人称单数是has

四、一般现在时的用法：

1、一般现在时常常与always, often, usually, sometimes, never every day, every week, every yeas等连用。 例：He always goes to school on foot. I often have lunch at home.

She does her homework at home every day. 2、一般现在时的一般疑问句结构。

Do/Does+主语+谓语（动词原型）+其他成分+问号 例： Do you work in a hospital? Does she go to school by bike? 3、一般现在时的否定句结构。

主语+don't/doesn't+谓语（动词原型）+其他成分。 例：I don't work in a hospital.

She doesn't go to school by bike. 典型例题：

例1.单项选择：---Where does Mr. Lee______? ---He______ in the USA.

A. live, live B. lives, lives C. lives, live D. live, lives

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