don't forget to smile.don't不要，forget忘记，to smile微笑。类似的句子如下:don't forget to learn.不万忘记学习。

don't forget to change.不要忘记改变。

don't forget to come back.不要忘记回来。

don't forget to vote.不要忘记表决。

don't forget to rest.不要忘记休息。

good luck to you.