逗号后的and为什么要加?In the poor parts of America's big cities there is a lot of crime,and much of it is serious.

逗号后的and为什么要加?In the poor parts of America's big cities there is a lot of crime,and much of it is serious. In the struggle,the strap broke and,with the bag in their possession.with在这句话里翻译为什么?还有and后为什么要加逗号? 英语成分I was drafted into the Army at the end of my junior year and,after four years in the service,had no inclination to return to finish college.这个句子中为什么and 后面要加逗号,为什么不加在其前面呢?第二个逗号后 this is because in the early days of radio,those who .中间为什么要加逗号 and后面加逗号什么意思 the strap broke and,with the bag in their possession. The flowers in the garden smell sweet()attracting visitors there.请问括号内要不要加逗号?为什么? （英语）这是什么句型,用了什么语法（）?But before long both died,one of starvation,and the other,melancholy,从 one of 后边,the other 后加逗号 并且没有加of ,为什么,做的什么结构? The plunging stock and property markets have shrunk savings,for retirement and otherwise.请问这里的for前面为什么加逗号?不加可以吗? and的用法and 是连词为什么有时看英语文章时在它的前面要加逗号?还有就是and在连接两个不定式是后一个不定式是否要省略to 英语的链接词后要不要加逗号如 to begin with ,next ,in addition ,finally 英语中 ,and 中 and本身就是连词为什么前面要加逗号那 在一句话中,and前可以加逗号吗?比如They can also send e-meals at any time,and get the latest information through the Interent,which is open to both teachers and students in school.第一个逗号，为什么可以加啊？ 英语造句何时用逗号When the field comes into sight,I feel quite relaxed and enjoy the fresh air.(sight后为什么要加个逗号,有的时候没必要的啊) Michael practised singing every day,______ to win the first place in the competition.为什么填hoping而不是hoped,前后谓语为什么不一致.为什么逗号后一定加ing His father,（who）drove a truck in a factory was hurt in a traffic accident and .His father,（who）drove a truck in a factory was hurt in a traffic accident and had to be in hospital.为什么要加括号里的WORK和括号前的逗号呢?是有 She and I will soon travel to the UK,where she will meet my family...这句话为什么要在where前面加逗号 写英语文章的时候用了and,and的前面要加逗号吗?RT 如果andl连接两个句子 and前面是不是一定要加逗号比如说I opened the door,and she came out.这个逗号是不是必须的