No. I won't be at work.不用，我不去上班了

at work在工作

I'm just trying to refrain from drowsing at work.

我只是试着别在工作时打瞌睡而已。

The mechanic was at work on your bicycle then.

当时修理工在修理你的自行车。

I know your friend is in a terrible situation,我知道你朋友的处境很糟糕

in a situation处在 ... 的处境中

The house is in a good situation at the top of the hill.

这座房子在山上的一个好位置上。

If you ever want to be able to swim again如果你还想要再能游泳的话

be able to会； 能

We hoped that we should be able to do that.

我们希望我们能这样做。

You are better able to do it than I (am).

你比我更有能力做这件事。