  1. 表达喜好

  I prefer A to B because...

  If I have a choice, I will... (a real possibility)

  If I had a choice, I would... (not a real possibility, just wishing)

  For me, A is much more attractive / interesting / preferable than B because...

  I would much rather do / have / eat / listen to / blah blah blah A than B...

2. 叙述

  When I was a high school student, I went to Guizhou to visit some friends.

  After I graduated from high school, I ...

  During my visit to Guizhou last year, I...

  Last year during the Spring Festival, I went to Guizhou to visit some friends.
(Also use "Whenever" or "While")

3. 比较和对比

  A is much better / worse than B.

  A is not nearly as good as B.

  A is not quite as important as B.

  A is almost as tall as B, but not quite.

  When I compare these two items, it's clear that...

4. 建议

  Maybe, Perhaps, Possibly

  One possibility that I can think of is...

  Another idea to think about is...

5. 表达观点

  It seems to me that...

  This is only my opinion but...

  After a lot of thought, I have come to the conclusion that...

  I've never thought about this question much before, but it seems to me that...

6. 解释

  The reason I believe this is...

  The most important evidence supporting my belief is...

7. 推测

  I'm not sure what might happen, but one possibility is...

  It's hard to predict the future, but I suppose it / we might...

8. 分析

  There are several points to consider, first of which is...

  We can break this question down into several parts. First...

  Let's look at this step by step. To begin with...

9. 总结

  Altogether, there were...

  In the end, they had to...

  When we consider all the factors...

  Considering all of these ideas, maybe the best thing would be to...

10. 修正

  Maybe I'm not making myself clear. I want to say that...

  What I mean to say is...

  What I'm trying to say is...

  Another way to put it is...