1.They have been suggested by the university that the course be taught with the new computer science textbook.
2.We have been promised by the computer department that we will be able to use laptops/a laptop every day.
[一般现在时]、He sings very well.He sits beside me.[一般过去时]、He sang a song last night.We sat round the table.[一般将来时]、He wii sing a song at tomorrow\’s party.He will sit beside me tomorrow.[现在完成时] I have sung a song.I have sat beside him.