1.我已经学了三年的英语了
I have learnt English for three years.
2.Lily在中国已经呆了半年
Lily has stayed in China for half a year.
3.他们溜冰已经溜了4小时
They have skated for four hours.
或：They have been skating for four hours.
4.你们到中国呆了多少时间
How long have you been in China? 1.我已经学了三年的英语了
I have learnt English for three years.
2.Lily在中国已经呆了半年
Lily has stayed in China for half a year.
3.他们溜冰已经溜了4小时
They have skated for four hours.
或：They have been skating for four hours.
4.你们到中国呆了多少时间
How long have you been in China?