Picasso's Blue Period was succeeded by a period that had a great impact on the developments of modern art.
 Even in Old English, usage of hwile ("while") was much more commonplace, with its frequency some six times as large as onmang t in a surveyed corpus
 In the example given, that intensifies and refers to a possible view already held by the addressee (whether the speaker was not seriously ill), even though the speaker does not explicitly confirm or intensify this previously-held belief

