他不得不去医院接受治疗。

Hehadto go to the hospital for treatment.

我得去医院看病。

I had to go to the hospital.

我要去医院探望我弟弟。

I'm going to the hospital to visit my brother.

我得去医院动手术。

I have to go to hospital for an operation.

他不得不去医院接受治疗。

He had to go to hospital for treatment.

我得去医院看病。

I had to go to hospital.

他本不必去医院的，去了只是想让自己放心点。

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

他用不着去医院，去了只是想让自己放心点。

He didn't need to go to hospital, but he went just to reassure himself.

他母亲得去医院做一个小手术。

His mother had to go to the hospital for minor surgery.