1/ Athough Nam is intelligent, he is so lazy
=> Despite Nam being an intelligent student, he is so lazy.
2/ Athough I study hard, I fail the exam
=> In spite of studying hard, I fail the exam.
3/ Athough I was tired, I watched TV late.
=> Despite I my tiredness, I watched TV late.
4/ Eventhough she is rich, she doesn't buy a car.
=> In spite of she being rich, she doesn't buy a car.