我认识她大约12年了,我猜。
I've known her for about 12 years, ___I ___guess.
我猜我爱她,尽管我们彼此不太了解。
___I ___guess that I love her, although we don't know each other very well.
电影晚上8点开始,我猜。
The movie starts at 8 PM, ___I ___guess.