为什么是the cat runs fast,不是the cat runs is fast?

run是动词，fast是副词，修饰run，the cat是名词做主语。后面那句有两个动词，runs 和is，重复了。

狗儿跑得快，猫儿跑得快。

名词是表示人或事物的词。例如：表示人的：雷锋、学生、同志……表示事物的：风、山、马、稻子、火车、道德、文化……表示时间的：春天、明年、早晨、现在、星期天……表示出所的：北京、亚洲、远处、里屋……合成的：以上、之下、前边、后面、东头、左右、中间……（名词的语法特征：略）动词是表示...

He is working now. /He is not working now. /Is he working now? /What is he doing now?She is my sister. /She is not my sister. / Is she my sister? /Who is she?The cat runs fast. /The cat doesn't run fast. /Does the cat run fast? /How does the cat run?

the是特指，a是泛指。我们在英语写作的时候怎么判断呢，可以遵循以下几个标准：情况1 名词的指代是特指 (Specific)，那么总是使用 'The'，无论是可数还是不可数词义，单数还是复数 例如：不可数词义The water on the floor is caused by my dog.可数词义 [C] 的单数The cat sitting there is ...

run...is having...do...is dancing...are...doing...are singing

所以她转身用力地跑。当然蛇是不会让她跑掉的，于是它紧随其后。小猫跑啊跑，不一会她看到一棵树。突然这只聪明的小猫想到了一个主意。她绕着这棵树一直跑，蛇也绕着树一直追。不久，这条蛇就动不了了。这时小猫一点也不怕了。开心极了。这只小猫真聪明啊。然后她继续往学校的方向走去。

也可以用”Rather“连接 需要注意的地方是英语的标点问题。分号的使用是不合适的。在一个意群结束时直接用句号，更简洁，也更符合英美人的习惯。An old woman had a cat. The cat was so old that she could neither run quickly nor bite anything. One day the old cat saw a mouse. She ...

根据The cat couldn’t run fast, and she couldn’t bite, 和she jumped and caught it. But she could not bite it. The mouse got out of her mouth and ran away可知这只猫老了，跑的不快，逮住老鼠，咬不动，杀不死老鼠，所以它能逮住老鼠。故选C。小题3:细节理解题。根据Then the...

The horse is a useful animal. 马是一种有用的动物。The computer is important to us. 电脑对我们来说是重要的。提示不定冠词+单数名词,不带冠词的复数名词也可表示一类人或物。例:A car runs faster than a bus. 小汽车比公交车跑得快。Cars run faster than buses.A dog is a faithful animal. ...