Смотрите: в значениях английского слова (в данном случае convince-убеждать,убедить) присутствуют значения что делать;что сделать. Как различить,если написал к примеру he convinced him он убеждал его от он убедил его или в каком времени употребляется что сделать, а в каком что делать?
Present Simple:
But you must help me.
You must know that by now.
But I must do as father says.
You must tell me!
I must apologize for Dulce.
You must please excuse me
We must have breakfast first.
"This is what you must do," said Boris.
That must be very interesting
I must go now to see my garden.
Past Simple:
Students had to wear uniform
She had to Learn English
They had to use mobile
You had to Operate Computer
They had to clean
I had to talk with him
She had to drive a car
They had to listen him
They had to think about her
He had to do job
We had to win
2 What time does Lizzie get to school in the morning? __8.45___
3 How long does each lesson last? __for 40 minutes___
4 What time does the morning break finish? ___11.20
5 When is the lunch? __12.40___
6 What time does the photography club start? _half past three
7 How many times a week does Lizzie play football?
8 What time does Lizzie go home? ___at half past four___
9 On which day does Lizzie have a dance class in the evening? _On Thursday___
10 What time does Lizzie go to bed? 9.45