I've always wanted a garden like theirs.

我总想有一座像他们那样的花园。

Don't count on a salary increase this year.

别指望今年会给你加薪。

For a beginner, you're pretty good.

做为一个初学者，你已经做得很好了。

I cannot forgive myself for not seeing my mother when she was sick in bed.

母亲病的时候我没能去看她，为这件事我永远不能原谅我自己。

This situation permits no delay.

在这种情况下，不允许有任何拖延。

It looks fine to me. But I have one suggestion.

我看写得不错，但有我个建议。