Джон приступил к работе в 3 часа, а

Джон приступил к работе в 3 часа, а в половине четвертого он ее уже закончил. Комната была в ужасном беспорядке.

Результаты (английский) 1:

John started to work in 3:00, and half of the fourth he has already finished. The room was in a terrible mess.

Результаты (английский) 2:

John went to work at 3 o'clock, and at half past three he had finished it. The room was in a terrible mess.

Результаты (английский) 3:

john began to work for 3 hours, and half of the fourth he already finished. the room was in a terrible mess.