be comfortable doing sth

be comfortable to do sth的用法 be always doing sth . be doing sth.when It is comfortable doing sth.有这个句型吗? be worried doing sth 还是be worried about doing sth be successful in (doing) sth.be successful at (doing) sth. be worth sth./doing sth.造句, be worthy of sth / doing sth. be busy doing sth/with sth be interested in doing sth be used to doing sth? be due to doing sth.