1、表选择关系或对等关系的连接词：either…or…，neither…nor, or, as well as…, and, both…and…。 2、表因果关系或对等关系的连接词：therefore, so, as a result, as the result of …，because of, due to …,owing to, thanks to等。 3、表时间顺序的连接词：the moment, as soon as, at first, then, later, meanwhile...
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