Сослагательное наклонение , написать 3 предложения в отрицательной форме

Did not she play fytboll

1) Tropical...climatesare hot and humid.
2) The heavy snowfall may...prevent..us from going out.
3) Bringing up children is a difficult...task
4) Globalwarming...affects the sea level.
5) That scientists is an...experton fossil fuels.
6) Something has to be done before more animals and plants become..extinct..
7) Cars ..release... fumes and pillute the atmosphere.
8) He promised to come but then he..changed...his mind.
9) We can all ..makea difference to the environment.
10) Gorillas are an...endangeredspecies.

М.З Биболетова, 3 класс. Используя упр.6 на стр 38 (Student's Book ) выпонила упр 3 на стр 26 (Workbook).

You must
You must eat carrots, apples and cabbage.
You must eat porridge, cheese and milk for breakfast.
You must drink juice every day .
You must wash your hands and face every day .
You must clean your teeth every day.
You must run in the morning.
You must skate and ski . You must swim , skip and jump.
You must play football or tennis.
You must walk and play with your friends.

You must not
You must not eat many sandwiches, sweets and cakes.
You must not be lazy.