连词用法口诀总结如下：

表示转折关系

however, nevertheless, nonetheless, but, yet, still, on the contrary, even though, although, despite等。

表示顺承关系

and, and then, also, too, in addition, what's more, furthermore, moreover, on top of that, first, second, third等。

表示解释说明

for example, in fact, in this case, for actually, for instance等。

表示一方面，另一方面

on the one hand, on the other hand, for one thing, for another等。

表示总结

in a word, all in all, above all, finally, at last, in conclusion, as I have shown, in another word, in brief, in short, in general, last but not least等。

这些口诀涵盖了连词在句子中常见的用法和搭配，有助于更好地理解和运用连词。