Book Three

Present tense forms of be: am, is, are Tenses (I) Present tense forms of be: am, is, are Which city is more interesting? I am a tour guide now. The students of Class 3 aren’t in the classroom. School is over.

Present tense forms of do: do, does I live in Hong Kong. I don’t live in Beijing. Do you live in Hong Kong? Which city do you think is more interesting? The Great Wall has a history of over twenty centuries. The Great Wall doesn‘t have a history of over fifty centuries. Does the Great Wall have a history of over twenty centuries?

Present continuous tense: be doing I am studying art. He is planning a trip to Mexico. We are thinking of going to the Great Wall.