if you are happy and you know it If you are happy and you know it, clap your hands If you are happy and you know it, clap your hands If you are happy and you know it Then you really ought to show it If you are happy and you know it, clap your hands If you are happy and you know it, stamp your feet If you are happy and you know it, stamp your feet If you are happy and you know it Then you really ought to show it If you are happy and you know it, stamp your feet If you are happy and you know it, shout hurray If you are happy and you know it, shout hurray If you are happy and you know it Then you really ought to show it If you are happy and you know it, shout hurray! If you are happy and you know it, do all three If you are happy and you know it, do all three If you are happy and you know it Then you really ought to show it If you are happy and you know it, do all three!
意思很简单，就是
if
you
are
happy
and
you
know
it
=如果感到高兴（直意是如果你是高兴的并且你知道你是高兴地。但是我觉得还是翻译成通顺的比较好，而且我们的歌就是这么唱的）
如果感到高兴你就拍拍手（clap
your
hands
=拍你的手，同样是为了歌曲的通顺而简化了翻译）
然后您就把他做出来（Then
you
really
ought
to
show
it=然后你应该把它秀出来）
stamp
your
feet
=跺跺你的脚
shout
hurray=大声笑（hurray其实是欢呼的意思，比如万岁，但是个要的话说万岁就比较那个了……）
do
all
three=所有的都做三遍
好了，最后总的来一遍
如果感到高兴你就拍拍手
如果感到高兴你就拍拍手
如果感到高兴你就把它做出来
如果感到高兴你就拍拍手。
如果感到高兴你就跺跺脚
如果感到高兴你就跺跺脚
如果感到高兴你就把它做出来
如果感到高兴你就跺跺脚。
如果感到高兴你就大声笑
如果感到高兴你就大声笑
如果感到高兴你就把它做出来
如果感到高兴你就大声笑。
如果感到高兴你就做三遍
如果感到高兴你就做三遍
如果感到高兴你就把它做出来
如果感到高兴你就做三遍
