can you pause in the middle of downloading

If you mean can you pause a torrent, then yes. Most torrent clients will allow you to pause or even stop a download in the middle, and then pick up where they left off when you start up again. Of course there may be no or fewer seeds, which may make it take longer when you restart. If you want to pause a download from a website, then both the site and your web browser have to support it. Hope this helps!