1. You're a good singer!
你唱歌真好听！
还能这样说：
You sing very well!
You are good at singing.
应用解析：
sing away 唱歌把……忘掉；唱歌庆贺；
sing out 大声喊出，大声唱；
sing to sleep 哼着歌儿使……入睡
2. I really enjoyed her singing.
我真的很喜欢听她的歌声。
还能这样说：
I did like to hear her sing.
I really liked her song.
应用解析：
really and truly 真正地；千真万确；
for real 认真的；
a real idiot 十足的傻瓜；
the real thing 了不起的经历或成就
3. They sang and danced all night after graduation.
毕业后他们通宵唱歌跳舞。
还能这样说：
They enjoyed themselves all through the night by singing and dancing after their graduation.
They kept singing and dancing throughout the night after they graduated from college.
应用解析：
all the night through 整夜；通宵；
night sweat 盗汗；
pass a night 过夜；
make a night of it 玩到天亮
4. He sang with a furry voice.
他用略带沙哑的嗓音唱歌。
还能这样说：
His voice rang huskily.
He sang raucously.
应用解析：
be in good voice 嗓子好；
in a hushed voice 低声地；
round voice 洪亮而柔和的嗓音；
strain one's voice 喊坏嗓子；扯起嗓子喊