1.Tom has been in China (since ) three years(ago ).
2.Three years ( have ) ( passed ) ( since) Tom cane to China.这里的year少了s哦
3.Tom ( came ) ( to ) China three years (ago ).
4.It is (three ) ( years) (since ) Tom came to China.
1.Tom has been in China (since ) three years(ago ).
2.Three years ( have ) ( passed ) ( since) Tom cane to China.这里的year少了s哦
3.Tom ( came ) ( to ) China three years (ago ).
4.It is (three ) ( years) (since ) Tom came to China.