(1)表示时间与频率的词汇:in general, every, some, after, on the whole, usually, most, at other times, in most cases, frequently, main, finally, as a rule, rarely, before, meanwhile.
(2)表示附加的词:additionally, as well as, just as, again, along with, also, further, furthermore, likewise, in the same manner, in the same way, in addition to,
(3)引出例子:for example, namely, for instance, as an example, that is
(4)表示转折:although, instead, rather than, but, nevertheless, though, however, on the other hand, otherwise
(5)得出结论:all in all, in consequence, in brief, as a result, the point is, in conclusion, therefore, hence, in sum.