for, 因为，为了。ever, 永远。

1. Although they're expensive, they last forever and never go out of style.

尽管价格昂贵，但它们经久耐用，永不过时。

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2. To this end the young child is forever watchful.

这个年纪不大的孩子为此始终保持警惕。

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3. I was forever dragging him away from the fireplace.

我老是要把他从壁炉边拉开。

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4. I'm forever on a diet, since I put on weight easily.

我永远都在减肥，因为我很容易长胖。

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5. She was forever running errands for her housebound grandmother.

她总是在为她不方便外出的祖母跑前跑后。

来自柯林斯例句