vim: how to leave vim in insert mode after execute a command

it looks, after any command executed, vim will be left normal mode.

how to make vim stay in insert mode after any ex command ?

example:

:normal iabc

<-- after this, I have "abc" in my buffer , but in normal mode.

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php
 
---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.