We should spend more time thinking about why people do such terrible things. While she was away, he often thought on her.
While she was away, he often thought about her. think about sb/sth (= give a lot of thought to): ‘She’s worried about her father and can’t stop thinking about him.’ ‘Have you ever thought about what you’d like to do for a living?’ ‘You look serious - what’re you thinking about?’ 3
He’s thinking to make another trip to Italy next month.
He’s thinking about making another trip to Italy next month. We’re thinking on going to the beach after lunch.
We’re thinking of going to the beach after lunch. When you are talking about possible future actions, use think about/of doing sth : ‘They’re thinking of starting their own health food business.’ ‘We’re thinking about going to Disneyworld again next year.’ 4
He advised me to think deeply about it before making a decision.
He advised me to think seriously about it before making a decision. think seriously/carefully (NOT deeply ) ( about sth ), especially before making a decision: ‘The job has a lot of attractions and in my opinion you should think seriously about it.’ 5
Some foreigners are thinking the Japanese are rich.
Some foreigners think the Japanese are rich. See Language Note at CONTAIN 6
I think she didn’t understand what you said.
I don ‘t think she understood what you said. Do not think (that) is more usual than think (that) ... not . This applies to
