Do sing along if you know the words.
要是知道歌词，你就跟着唱吧。
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。
I can't sing that high.
我唱不了那么高的调子。
He doesn't sing all that well.
他唱得并不特别好。