英语中文意的转折如何处理？

but是连词，表示（较强的）转折，连接两个句子时只用加逗号。例如：I love her, but she doesn't love me.

however是副词，也表示（较强的)转折,但连接两个句子时要用分号，而且在这个词后还要加逗号。例如：I love her; however, she doesn't love me.或者将两句子分开写。例如：I love her. However, she doesn't love me.

while作连词使用时，表示（较弱的）转折，连接两个句子时用逗号，但两个句子的主语不一样。例如:I like singing, while my sister likes dancing.

yet作连词使用时，也表示（较弱的）转折，连接两个句子时也用逗号，但两个句子的主语是一样的。例如：He has a good job, yet he never seems o have any money.

句子转折词的桥梁
“They are wasting resources, for example, time, energy and money.”

上面这句话不错，只是转折词“for example”不妥当；应该这样：

“They are wasting resources. For example, they use too much time, energy and money.”

不然就要换一换转折词，改用“such as”或“like”：

“They are wasting resources, such as (or like) time, energy and money.”

不管任何语言，转折词（transitional words）都扮演着一个重要角色，就是：承先启后，使句子紧凑，段落相吸，对文章结构，有良性作用。但是有些人几乎没有采用转折词的习惯，结果文句松散，上下文七零八乱，应该避免。

现在把主要转折词，分类列下，供大家参考。