I would like to ask whether there is a significant difference between "think of" and "think about" or not. My dictionary is nor exactly precise on this matter so I will be very grateful for any help. Thank you in advance.
In some sentences, you can use think of or think about with no difference in meaning, but there are some differences in usage. In general, think of + object is often used to talk about your opinion about things. For example:
What do you think of Karen's new boyfriend?
I'm not sure what I think of the changes in government policy.
Whereas think about without any object can be used in a more general meditative sense, such as
I sat in the sofa thinking about the weekend.
What are you thinking about?
I don't know if American usage is different on this point.