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 / ... A than B ...
When I was a high school student, I went to Guangzhou to visit some friends.
After I graduated from high school, I ...
During my visit to Guangzhou last year, I ...
Last year during the Spring Festival, I went to Guangzhou to visit some friends.
(Also use "Whenever" or "While")
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...
Maybe, Perhaps, Possibly
One possibility that I can think of is ...
Another idea to think about is ...
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 ...
The reason I believe this is ...
The most important evidence supporting my belief is ...
I'm not sure what might happen, but one possibility is ...
It's hard to predict the future, but I suppose it / we might ...
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 ...
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 ...
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 ...