Can ~, might ~. Expresses the speaker's speculation about an event that is likely to happen, but the level of certainty is not very high.明日は雨が降るかもしれません。
Verb in て-form + いますN5
In the process of ~, already ~. Expresses the state of an object or phenomenon.窓が開いています。
Verb plain form + と + 思われて いますN5
It is said that ~, it is believed that ~. Expresses the general opinion of many people about a certain issue.この問題は難しいと思われています。
でもN5
But, however. Used to connect two sentences or two clauses, indicating contrast or opposition between the two parts.このケーキはおいしいです。でも、高いです。