Ìîäàëüíûé ãëàãîë be to óïîòðåáëÿåòñÿ: 1) Äëÿ îïèñàíèÿ äåéñòâèÿ, íåîáõîäèìîãî ñîãëàñíî íåêîåìó ïëàíó, ...

Ìîäàëüíûé ãëàãîë be to óïîòðåáëÿåòñÿ:

1) Äëÿ îïèñàíèÿ äåéñòâèÿ, íåîáõîäèìîãî ñîãëàñíî íåêîåìó ïëàíó, ðàñïèñàíèþ èëè èíñòðóêöèè:
When are you to come to dentist’s? Êîãäà òåáå íóæíî ê çóáíîìó?
The train is to leave in 16 minutes. Ïîåçä îòïðàâëÿåòñÿ ÷åðåç 16 ìèíóò.
When you come back, you are to make a detailed report. Ïîñëå âîçâðàùåíèÿ Âû äîëæíû ñîñòàâèòü ïîäðîáíûé îò÷åò.

2) Ïðè êàòåãîðè÷åñêîì çàïðåòå (â îòðèöàòåëüíîé ôîðìå):
Strangers are not to enter the ward. Â ïàëàòó çàïðåùàåòñÿ âõîäèòü ïîñòîðîííèì.

3) Äëÿ îáîçíà÷åíèÿ ïðåäîïðåäåëåííîñòè èëè íåèçáåæíîñòè:
This average schoolboy was to become a world-famous football star. Ýòîò ïðîñòîé øêîëüíèê âïîñëåäñòâèè ñòàíåò âñåìèðíî èçâåñòíîé ôóòáîëüíîé çâåçäîé.

4) Äëÿ îïèñàíèÿ ïðèíöèïèàëüíîé íåâîçìîæíîñòè (â îòðèöàòåëüíûõ ïðåäëîæåíèÿõ):
This amount of work is not to be done in one month. Òàêîé îáúåì ðàáîòû íåâîçìîæíî âûïîëíèòü çà îäèí ìåñÿö.