any time和anytime有没有anytime的说法啊如果有,准确一点

1. at any time---是前置词片语，作副词用
例如：You may come at any time.
2. anytime---是副词
例如：You may come anytime

二者意思相同,但
any time是一个形容词加名词,可以中间加词使用,如：
at any other time,at any spare time,at any suitable time
anytime是副词,做状语,可置于句首,句中,句尾,单独使用!