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...