Birds were already singing in the garden.
小鸟已经在花园里歌唱了。
She has a good singing voice.
她有一副很好的歌喉。
He's singing an octave lower than the rest of us.
他唱的比我们其他人都低八度。
I was just walking along singing to myself.
我独自唱着歌向前走着。
I'll sing if I want to ─ there's no law against it.
我想唱就唱——谁也管不着。
There is some similarity in the way they sing.
他们的演唱风格有点像。