最常见的:1.表示补充说明的: moreover, in addition, furthermore.Example: She took a shower last night. Moreover/In addition/Furthermore, she had a nice dinner with a few friends.这些词一般后面要跟与前文观点不冲突的语句,比如不是相反的意思.2.表示结果:therefore, as a result, thus, hence.Example: She did not take a shower last night. As a result, she felt tired this morning while working.3.表示比较对照:on the contrary, in contrast, however, nevertheless, instead.Example: She did not take a shower last night. On the contrary, she went to the gym and spent two hours there.这些词是连接与前文不一样的观点,而且往往强调词后观点。