Перепишите каждое предложение дважды:в и в будущем времени. Заменяйте модальный глагол must его эквивалентом.
You must read the text several times.
The doctor must examine the child.
You must take part in the work
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1) You will have to read the text several times.
You had to read the text several times.
2) The doctor will have to examine the child.
The doctor had to examine the child.
3) You will have to take part in the work.
You had to take part in the work.