（1）表示時(shí)間與頻率的詞匯：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）表示附加的詞：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）表示轉(zhuǎn)折：although, instead, rather than, but, nevertheless, though, however, on the other hand, otherwise
    （5）得出結(jié)論：all in all, in consequence, in brief, as a result, the point is, in conclusion, therefore, hence, in sum