1)As for me, I'd like to join the 5th event
2)I think, that plant a tree day would be the most efficient, because it will be the first step in solving environment problems
3)I suppose that car free day will be the most difficult to organise and take part in, because most of the people totally depend on their own transport and they can't spend a day without it
4) We could substitute cars for bicycles. They are environmentally friendly
5) 1, If everybody plants a tree our planet will have a new "lungs"
2, If everybody refuses using a car for the day, we will save a lot of petrol
3, If everybody stops using electrcty, we will save natural resources
4, If everybody buys nothig for he day, the world ecomony will save money to help all sick people
5, If everybody smiles at all stranqers, they will pick themselves up
ну past simple(простое время):
-в утвердительной форме вс глаголов нет.
(добавление окончания -ed)
Например: I worked. – Я работал.\
а past perfect-это совершонное действие
тоесть образуется при вс глагола had (третья форма глагола to have) для всех лиц и чисел и смыслового глагола в третьей форме
(для правильных глаголов – инфинитив + окончание -ed; для неправильных глаголов – третья колонка из таблицы неправильных глаголов английского языка)
Например:
I had worked. – Я работал. He had worked. – Он работал.