Present Tense: think / thinks
- What does he think about his class?
- He thinks it’s difficult.
- What do the other students think?
- They also think it’s difficult.
Present Continuous Tense: (be) thinking
- What‘s he thinking about?
- He’s thinking about the answer to a question.
Past Tense: thought
- He thought he knew the answer.
Infinitive: It’s necessary to think about your future goals in education.
Gerund: Thinking about and planning for the future is a smart thing to do.