1. Carchi Polytechnic State
University.
School of Foreign Trade and
International Negotiations.
NAME: Nathaly Santamaría.
LATE: 2012

2. Homework
Active Modals.
People can prevent pollution.
We must plan many tress
People should not throw rubbish.
People might save water.
Passive Modals.
Pollution can be prevented.
Many trees must be planted.
Rubbish should not be thrown.
Was might be saved.

3. Active Present Perfect.
Companies have cut many trees in the forest.
Farms have polluted some rivers.
Companies have cut many trees in Quito.
Cars smoke has polluted the cities.
Passive Present Perfect.
Some rivers have been polluted by farms.
Many trees in Quito have been cut by Companies.
The cities have been polluted by cars.

4. Sentences
I think she is sick, she is bed herself.
Susan feels tired. She must have been working hard lately.
These shoes should not have been mended. They are too old.
Smokers should not have been allowed inside the restaurant.
Should the candles have been lit in the evening?
That statue should have been shown in the art gallery.
Johny was fired. I think he should have been given another opportunity.
Diana's death could have been prevented.
The infection he had suffered might have been caused by the contaminated
catheters.
There is too much smog in cities. What do you think should be done?
I think glass should be used paper recycle.
I think factories should be used protect environment.
I think the governors have to do advertising campaigns for polluters.
I think oils should be removed from feathers whit dish soap.

5. Pollution of rivers.
The pollution of rivers have been avoided if people were aware of the damage this
causes to the environment.
This should have been controlled presidents of countries long ago, because it
affects the health of people who live on this planet earth.
As the pollution in the river has Tajamar, which was capped for littering on the
bridge floods death families living around.
We should not throw garbage into rivers because it contaminates