В данном топике я рассмотрю довольно сложную грамматическую тему: использование конструкций do so и such. Поехали...

а)            Do so употребляется вместо повторяющейся связки глагол + подлежащее или глагол + дополнение, когда из контекста ясно, о чем идет речь. Можно также употреблять связки: does so, did so, doing so и другие.

• She won the competition in 1997 and seems likely to do so (= win the competition) again this year.
• Dr Lawson said, 'Sit down.' Cathy did so (= sat down), and started to talk about her problems.
• The climbers will try again today to reach the summit of the mountain. Their chances of doing so (= reaching the summit of the mountain) are better than they were last week.
• When he was asked to check the figures, he claimed that he had already done so. (= checked the figures)