以下几句英语有什么区别?1.She sings well.和 She is singing well.2.He is not at home.和 He is not home yet.3.by the time he is 14.和 by the time he was 14.

以下几句英语有什么区别?1.She sings well.和 She is singing well.2.He is not at home.和 He is not home yet.3.by the time he is 14.和 by the time he was 14. 这两句英语句子有什么区别吗?以下两句：She drank the medicine up bit by bit.She drank up the medicine bit by bit.区别是什么?最好能罗列出知识点, 以下几种开关电源有什么区别?各用在什么地方? 英语中so does she和so she does有什么区别 mov AX,[SI] 和 MOV [SI],AX 各自什么意思,有什么区别,假设DS=2000H,SI=1234H 以下两个句子有什么区别?she went to school wearing wrong clothesshe went to school with wrong clothes. 英语中的复合句和复杂句有什么区别? sometime的一些区别以下有什么区别,sometimesome timesometimessome times一年没学英语了都忘光了... 请教汉语拼音读法说来惭愧,这么多年来小弟一直搞不清这几个拼音的读法有什么区别,shi.si.she.se还有chuan和chuang我怎么感觉听起来读起来都一样,汗 SC气缸和SI气缸和SU气缸有什么区别 this is his book 和this book si his.有什么区别 She is always和She always有什么区别? so does she 与 so she does有什么区别? who she is 和who is she有什么区别 she's饰品与 she'sgirl有什么区别 英语半倒装句中did的含义?如 so sad did she look 和 so sad sh英语半倒装句中did的含义?如 so sad did she look 和 so sad she looked 这两句有什么区别 英语back和be back有什么区别?She will back from school.She will be back from school.有区别么? she said she will do和she said she would do有什么区别