1.Four years have elapsed since he went to London.

1.自去伦敦, 过四年。

2.Five months have elapsed since he joined the army.

2."自军以后,经五个。"

3.A month elapsed, the girl was narcose all the same.The boy was peaked and pined, but he still believed that she would get better one day.

3.个过去，女孩仍然昏睡着，而男孩早憔悴不堪，但仍苦苦地支撑着。