Wherever can he have gone to?

他究竟会到哪儿去了呢？

We have gone to the rest room after dinner.

饭后我们都到休息室去了。

Claire's car wasn't there, so she must have gone to her mother's.

克莱尔的汽车不在那儿，想必她是去她母亲家了。

He needn't have gone to hospital, but he went just to reassure himself.

他本不必去医院的，去了只是想让自己放心点。（英国英语意为“他做了不需要做的事”）

I have gone to premieres in my dreams but I never thought I'd do it for real.

我在梦中多次参加过首演，但我从没想到我会真的参加。