Hi, Lily.
If you've already done grammar on Present/Past Continuous you know that these tences are used to talk about some activity in process.
There are some verbs which can't be used in Continuous because they don't describe any activity, e.g.
I have children - I have children
at the moment, but I don't
do anything. Such verbs are called
non-active.
There are two main groups:
1. verbs of thinking and understanding (think, believe, remember, forget, understand, agree, etc..)
2. verbs of seeing, hearing, feeling... (see, hear, feel, love, prefer, like, hate, etc...)
With non-active verbs we use Simple tences instead of Continuous. So we use Past Simple (not Past Continuous) in sentences like: "I loved him" (not "I was loving him"!)
But this grammar is done at intermediate level, so if you are lower don't bother about it yet :-)
Best wishes.
Julia.