Clean
Cleaning
*I am cleaning the street
*I am not cleaning the street
*Am I cleaning the street?

Plant
Planting
*He planting a tree
*He isn´t planting a tree
*Is He planting a tree?

Wash
Washing
*She is washing with little water
*She isn´t washing with little water
*Is She washing with little water

Throw
Throwing
*I am throwing trash in trash can
*I am not throwing trash in trash can
*Am I throwing trash in trash can?

Walk
Walking
*He is walking to the school
*He isn´t walking to the school
*Is He walking to the school?

Eat
Eating
*He is eating organic food
*He isn´t eating organic food
*Is He eating organic food?

Use
Using
*I am using clean energy
*I am not using clean energy
*Am I using clean energy?

Stop
Stoping
*They are stoping the pollution
*They aren´t stoping the pollution
*Are They stoping the pollution?

Help
Helping
*We are helping to nature
*We aren´t helping to nature
*Are We helping to nature?

re-use
re-using
*I am re-using bottles
*I am not re-using bottles
*Am I re-using bottles?

Do
Doing
*They are doing exercise in the nature
*They aren´t doing exercise in the nature
*Are They doing exercise in the nature?

Save
Saving
*I am salving the planet
*I am not salving the planet
*Am I salving the planet?

Turn off
Turning off
*He is turning off his car
*He isn´t turning off his car
*Is He turning off his car?

Recycle
Recycling
We are recycling the plastic
We aren´t recycling the plastic
Are We recycling the plastic?

Ride
Riding
*He is riding in horse to work
*He isn´t riding in horse to work
*Is He riding in horse to work?

Buy
Buying
*They are buying a solar panel
*They aren´t buying a solar panel
*Are They buying a solar panel?

Share
Sharing
*You are sharing your organic food
*You aren´t sharing your organic food
*Are You sharing your organic food?

Waste
Wasting
*The people are wasting water
*The people aren´t wasting water
*Are the people wasting water?

Purify
Purifying
*We are purifying the water
*We aren´t purifying the water
*Are We purifying the water?

Read
Reading
*I am reading a book
*I am not reading a book
*Am I reading a book?