1. Think to
   1. Whenever I’m in a meeting at work, I think to myself, “This is a huge waste of time.”
   2. Sorry I didn’t see your message – I didn’t think to check my e-mail before I left the house.
   3. I’m annoyed because all my friends went to the movies and didn’t think to invite me.
   4. “Think to” is most frequently used with “myself” – when you think about something, but you don’t say it or share it with any other person. “Think to myself” is often followed by a direct statement of the thought.
   5. “Didn’t think to” can also be used when something did not even enter your mind.
2. Think Over... Think Through...
   1. I’m not sure which course I want to take. Let me think it over for a while.
   2. I’ll need some time to think through your proposal. Can I call you back next week?
   3. Use the prepositions “over” and “through” when you need to consider a topic carefully or think about it for a longer time (hours, days, or weeks).
3. Think Ahead... Think Back...
   1. We need to think ahead at least five years if we want our company to have long-term success.
   2. I like to think back on my college years; that was a great time in my life.
   3. The preposition “ahead” is used for thinking about the future: The preposition “back” is used for thinking about the past:
4. Think up
   1. We need to think up a way to distract Laura while we plan her surprise party. Sürpriz partisini planlarken Laura'nın dikkatini dağıtmamız için bir yolunu bulmalıyız.
   2. I spent half an hour trying to think up a good excuse for why I was late to work. İşe geç kalmamın nedenleri için iyi bir bahane bulmaya çalışırken yarım saat geçirdim.
   3. Let’s think up some new strategies for increasing sales. Satışları arttırmak için yeni stratejiler düşünelim.
   4. Think up - fikir üretmek, tasarlamak, bulmak
5. Think about ... Think of...
   1. Every time I hear this song, I think of my mother. Bu şarkıyı her dinlediğimde annemi düşünüyorum.
   2. What do you think of my new haircut? Yeni saç kesimi hakkında ne düşünüyorsun?
   3. I’m thinking about moving to a different city. Farklı bir şehre taşınmayı düşünüyorum.
   4. I still get angry when I think about all the rude things my sister said to me. Kız kardeşimin bana söylediği kaba şeyleri düşündüğümde hâlâ kızgınım/kızıyorum.
   5. think of - anımsamak, aklından geçirmek (kısa süre) think about - uzun uzun düşünmek