连接词和词组就象粘合剂，把句子顺溜成段落，把段落变成一气呵成的文章。 没有连词，文章读起来就象机械拼装的一堆单句,感觉就不那么好了.

以下是一些连词的举例:

1. To indicate a time or frequency or amount: （表示时间或频度的）
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. To indicate an addition:（表示并列的）
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. To introduce an example: （表示举例的）
for example, namely, for instance, as an example, that is

4. To indicate a contrast or difference: （表示相反或相关的）
although, instead, rather than, but, nevertheless, though, however, on the other hand, otherwise

5. To indicate a conclusion: （表示结果的）
all in all, in consequence, in brief, as a result, the point is, in conclusion, therefore, hence, in sum.