Present perfect tense
s+have/has+v3
1. people (start) saving forest by recycling paper
2. children all over the world (involve) in environmental activities
3. local government (provide) trashbins to be put along city streets
4. gases from refrigerators and air conditioner (destory) the ozone layer
dibantu yak....!
s+have/has+v3
1. people (start) saving forest by recycling paper
2. children all over the world (involve) in environmental activities
3. local government (provide) trashbins to be put along city streets
4. gases from refrigerators and air conditioner (destory) the ozone layer
dibantu yak....!
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2. children all over the world have involved in ............
3. local government has provided trashbins ..............
4. gases from refrigerators and air conditioner has destroyed the ozone layer