1) big 係表示大的意思,常用於口語,多指面積,體積,重量,或範圍,程度等.
e.g. In front of the house stood a big tree .
I have caught a big fish .
The box is too big to carry .
John worked in a big factory two years ago .
2) large也是表示大的意思, 多指西面積,體積,容積,範圍或數量等,但不如big口語化.
e.g This is a large window .
I saw a large animal standing near the car park yesterday .
We live in a large house .
Their factory is a large one in Guangzhou,China .
3) great常常表示偉大的意思.
e.g. The Chinese culture is a great culture .
Ours is a great country .
This is a great river .