1. Although he was hard-working, he got bad marks
→He got bad marks although he was hard-working
2. It rained heaving so we couldn't go to school
➝Because it rained heavily, we couldn't go to school
3. There are tô students in my school
➝My school has ?? students
4. English is more interesting than Maths
➝Maths isn't as interesting as english
➝ Math is more uninteresting than English