HW: Complete each sentence with the correct tense of the verb.

1. They are busy. They have been working___ work (work) from six o'clock to nine o'clock every day.
2. What are you doing_? (do). That is not right!
3. I can't believe it! I ___have been standing or have stood ( stand) here for three hours waiting for the bus.
4. How many potatoes have you peeled(peel)? Twelve.
5. I can't meet you tomorrow. I (am going to) to Busan.

Question
When is present tense used?
How to use present tense and present perfect? I'm confused the difference between the two.

ANSWER:

Look at the time expression.

Present Tense uses every day, every week, every ~, on Saturdays (It's a daily routine/or weekly or monthy; or it's just a fact)

Present Perfect uses lately, for, since, already, for the first time ~(from past to present events)