Simple Tense.
1) If Mary ... (to
have) a toothache, she should go to the dentist.
2) The snow ... (to
melt) when the sun ... shine).
3) Sue ... (not to go) to the mountains until
she ... (to pass) her exams.
4) We ... (to have) lunch when you ... (to
be) hungry.
1) If Mary has a toothache, she should go to the dentist.
2) The snow will melt when the sun shines.
3) Sue will not go to the mountains until she passes her exams.
4) We will have lunch when you are hungry.
Объяснение: