【正文】
列關(guān)系: and, or, either...or, both...and, not only...but also, as well as 轉(zhuǎn)折關(guān)系: but, however, yet, although 條件關(guān)系: if, whether, unless 時(shí)間關(guān)系: when, as, before, after, while, until, since, as soon as 原因關(guān)系: because, as, since, for appreciation let