GRAMMAR

to be thinking about + verb + ing

You think and talk about "something".    

The speaker says:

  “I am think to go to Rio tomorrow.” INCORRECT

The speaker should say:

 “I am thinking about going to Rio tomorrow.” CORRECT
EXAMPLES:

  • I am thinking about studying Spanish next semester.

  • She was thinking about going to the US, but changed her mind.

  • Bill had been thinking about investing in Exxon stock, but invested in Alibaba instead.

  • Are you thinking about moving to Orlando?
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  • He's thinking about: +
    eating, working, studying, visiting, going to, buying, sleeping,reading, speaking, writing, etc......