H) поставьте следующие предложения в вопросительную и отрицательную формы. 1) he carried out a number of experiments. 2) the students come to the institute at 8.30. 3) he will invent different devices.

вопросительную
1) Did he carry out a number of experiments?
2) Do the students come to the Institute at 8.30?
3) Will he invent different devices?
отрицательную
1) He did not carry out a number of experiments.
2) The students do not come to the Institute at 8.30.
3) He will not invent different devices.

He did nor carry out a number of experiments. (отриц)/ Did he carry out a number of experiments? (вопрос) или What did he carry out?
The students don't  come to the institute at 8.30. (отриц)
Do  the students come to the  institute at 8.30? (вопрос)
He  won't invent different devices. отриц
Will he invent different devices? вопрос