Using computers you can send e-mails quikly and easily.

问题描述:

Using computers you can send e-mails quikly and easily.
这句话句型对么?感觉怪怪的.是不是要在Using computers后面加一个逗号啊.

you can send e-mails quikly and easily by computer我知道这种说法,但是上面那个句子出现在练习题上,这句话对不对。?对的那它是什么句呢?简单,并列 or 复合?主语是什么呢?谢谢!