Подчеркните сказуемое в следующих предложениях 1. what is boiling in the flask 2. the ship will be crossing the channel at 9 о'clock according to the timetable. 3. they were mounting the new machine-tools from 5 to 7 о'clock. 4. an interesting research is being done at our institute. 5. what are you doing tonight?
2will be crossing- Future Continuous Passive
3were mounting-Past Continuous Active
4is being done-Present Continuous Passive
5are doing-Present Continuous Active