The past is always tense, the future perfect.

I'm here to give joy to the world and to help children all over the world.

如果你觉得失去了一切，请记住，树木每年都会落叶，但它们依然挺立，等待更好的日子。

I'm very shy, believe it or not. I'm very different from the person you see on stage.

一家公司的遗产不仅由其利润定义，还由它如何对待土地来定义。