I have a problem about the use of tense of a verb.
On the TOEFL test, there is a sentence mixed the past with the present. It it possible to use the past and the present in one sentence? When we can use and can not use these tenses in a sentence?
How about these sentences, are these correct or incorrect? And why?
- When I was child, he always goes to the circus.
- Last semester he reads seven books and wrote five papers.
- Steves wakes up early every morning because he went to work early.