英语与语法基础--时态.ppt

Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. （一）、一般现在时 （二）、现在进行时 （三）、一般将来时 （四）、一般过去时 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. (一). 一般现在时 1. 基本意义： 1) 表示现阶段经常性、习惯性的动作或状态。如： I go to school on foot. The trees are green. 2) 表示个人爱好、习惯。如： I like red and pink. They hate to do lots of housework. 3) 表示客观真理或自然现象。如： Leaves turn yellow in autumn. Our teacher told us that water freezes below zero. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2. 基本构成 1) 当表示习惯性的动作时，它的构成是：主语+实义动词+其它。 当主语是we, you, they或复数名词时，句子的谓语动词用原形。当主语是he, she, it,等时，动词要用第三人称单数。变换句型时，要用助动词do/ does。如： She goes to bed late every day. We dont clean our bedroom on Sundays. Do you clean your bedroom on Sunday? 2) 当表示存在的状态时，它的构成是：主语+am / is / are+其它。变换句型时，要借助be动词。如： Are Jim and Danny in China now? Yes, they are. / No, they arent. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3. 常用时间状语： every day / month / year, on Sundays, in the morning / afternoon / evening, always, usually, often, sometimes, never, three times a week, every four days等。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4. 注意问题： 一般现在时主要由动词原形表示，但第三人称单数后的动词词尾有所变化。第三人称单数动词词尾的变化有几种形式： (1). 一般情况加-s (reads, says, takes) (2). 以ch, sh, s, x, 或o结尾的词 加-es teaches, washes, goes, misses, (3).以辅音字母加y结尾的词 变y为i再加-es studies, cries, carries Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 同步练习 1. Mike sometimes __________(go) to the park with his sister. 2. At eight at night, she __________(watch) TV with his parents. 3. ________ Mike________(read) French e