Поставьте в вопрос предложения: 1)our class always does some projects and helps the community. 2) nowadays people can communicate easily with each other. 3)peter has been doing maths for two hours. 4)our conversation with tom was very difficult yesterday. i could not understand what he was talking about.

1.) Does our class always do some projects and help the community?
2.) Can nowadays people communicate easily with each other?
3.) Has Peter been doing Maths for two hours?
4.) Was our conversation with Tom very difficult yesterday?