If you say that you think that something is true or will happen, you mean that you have the impression that it is true or will happen, although you are not certain of the facts.
觉得
I'll have a think about that.
我会就那件事有所考虑。
You use expressions such as come to think of it, when you think about it, or thinking about it, when you mention something that you have suddenly remembered or realized.
想起来了
| 过去式 | 过去分词 | 现在分词 |
|---|---|---|
| thought | thought | thinking |