一般现在时的基本用法

一般现在时的基本用法

用法一: 表示现在经常性或习惯性的动作。(动词用原型，第三人称+s)

 Tom wears a belt round his waist. 汤姆腰里系着一根皮带。解析：Tom (第三人称)wears(wear+s 即原型+s) a belt round his waist. 这里表示经常性的、习惯性的动作，Tom 腰里系着一根皮带，今天也系了，明天、后天……或许一直系了着，一直处于这种状态。 2.The train goes backwards and forwards between the two towns. 这列火车在两座城市间来回开。 3. I leave home for school at 7 every morning. 用法二：观真理，客观存在，科学事实。The earth moves around the sun. Shanghai lies in the east of China. The sick child is better today. 生病的孩子今天身体好点了。I enjoy songs such as this one. 我欣赏这样的歌曲。I like all musical instruments except the violin. 除了提琴我什幺乐器都喜欢。用法三：表示现在的能力、特征、职业等。He sings well. 他唱歌唱得好。Mr. Smith teaches French. 史密斯先生教法语。用法四：表示客观真理、科学事实、格言以及不受时间限制的客观存在。Summer follows spring. 春去夏来。Knowledge is power. 知识就是力量。The earth turns around the sun. 地球绕着太阳转。易错点击：在做题时，错误主要出现在人称及句式变换上。其句式变化可分为两种情况1)表示动作，一般人称作主语的，变否定句须在动词前加助动词don’t;变一般疑问句须在句首加

助动词do。例. They have lunch at 12:00. They don’t have lunch at 12:00. Do they have lunch at 12:00? 2) 单三人称做主语的，变否定句须在动词前加助动词doesn’t;变一般疑问句须在句首加助动词does。例. Jenny speaks English very well. Jenny doesn’t speak English very well. Does Jenny speak English very well? 含有be动词的要在be上做变化. 例. Danny is a good student. Danny