How can we describe university's studying? When we talk about university, we say grade one, grade two..., or year one, year two...,or first year, second year...?

Which one is correct "Would you not play with him" or "Would you don not play with him"? Which one is correct "Would you not play with him" or "Would you don not play with him"?

What is the correct (.... ; however, ....) , (.... ; however, ....) , or (.... ; however, ....)? For example, which of these sentences is correct? People say that animals in zoos are protected and served; however, others say that keeping them in zoos is cruel. People say that animals in zoos are protected and served, however, others say that keeping them in zoos is cruel. People say that animals in zoos are protected and served, however others say that keeping them in zoos is cruel.

What is the difference between "would help" / "would have helped"? What is the difference between "would help" / "would have helped"? When do I say "I would help you"?, and when do I say "I would have helped you."?

two and a half hours / a half and two hours ? The movie takes two and a half hours. Or The movie takes a half and two hours.

Using was and were with I. If I (was / were) in your situation, I would escape. If I (was / were) you, I would escape.

(Why English is important?) or (Why is English important?) Which of the following question is correct grammatically? (Why English is important?) or (Why is English important?)

Students who study for master and PhD degrees are (postgraduate students) or (graduate students)? Students who study for master and PhD degrees are (postgraduate students) or (graduate students)?

What is the opposite of: (to get someone worried about something)? What is the opposite of: (to get someone worried about something)