Please, explain the difference between: 可是, 但是, 不过, 但却.

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Answer

都有转折的意思，但是语气的强弱在使用时有区别，语气强弱的排名从高到低依次是但却，但是，可是，不过。 
They all have the meaning of turning, but the strength of tone is different when used. From high to low, the ranking of strength of tone is but, but, but, but.

Answer

Мы можем вместе изучать английский язык.