5 câu hiện tại đơn và phủ định
- Water boils at 100 degrees Celsius. => Water isn't boils at 100 degress Celsius.
- The weather is hot today. => The weather isn't hot today.
- She is very beautiful. => She isn't beautiful.
- I go to school everday => I don't go to school everyday.
- The exam is hard => The exam isn't hard.