谁知道however, but, though , although, while ,as ,since, for, 的...答:Our purpose is not to do it for you but to teach you to do it by yourself.我们的目的不是替你做这事,而是教会你自己来做。 3. 可是,然而 She looks very young, but she is already in her 30's.她看上去很年轻,可是她已三十多岁了。 4. (表示惊讶、不同意等)喔,哇 Heavens, ...