1）I mean, you know, you see, what I mean is that等用来进一步解释先前的说法。
例：We are wasting our time. I mean/You know/You see/What I mean is that we spend most our time not living in the moment. We are either regretting the past or worrying about the future.
2）By the way, talking of, speaking of用来引出一个与先前所说的话字面有联系的新话题。
例：A) My mother does most of the cooking at home. She cooks really delicious food. By the way, my favorite food is hot pot.
B) My favorite month of the year is September, with the blue sky, fresh air and many holidays. Speaking of holidays, Christmas is coming.
3）anyway, anyhow表示可以回到先前提到的某件事。
例：Anyway, to answer your last question, I do love classical music.
4）as far as I know, as far as I can see, as far as I’m concerned 表示说话者就个人而言或发表自己的看法。
例：A lot has been lost and, as far as I can see, little has been gained.
