英语连词成句，why ,send,not,her,to,,an,e-mail

Why not send an e-mail to her?
why not后跟动词原形
send sth. to sb.
意思是为什么不给她发一封邮件呢？
保证正确，哈哈~

why not send to her an e-mail?
为什么不给她发邮件呢?

why not send an e-mail to her? 为何不发封邮件给她呢？

why not send to her an e-mail?

Why not send an e-mail to her?