If we leave now, we catch the early bus to the city centet.

If you study harder, you get better results in the final exam.

If she invites me to her birthday party, I go for sure

Tony promised that he would do his homework today.

Landa said that she would meet me at the cinema tomorrow.

My brother said that he had to finish the project now.

John told me that he was staying at home today.

Ecotourism must benefits the local people and involve the local community.

Students should wears uniforms when they go to school.

You must cleans your room before going out.