Определите функции глаголов to have, to be, to do.

1. while liquid-crystal technology is well-characterized and has been proven reliable in many years of display applications, it has three noted disadvantages.
2. the mtusi is a large scientific center with a high rating among other institutions of technical education in russia.
3. yesterday we wanted to send a fax but the destination fax was engaged so the fax remained unsent.
4. finally the copy tray is to be fitted on the opposite side.
5. this miniature electronic computing machine does not need a human.