3, second movement; see the original.

This phrase exhibits an ending, unmistakably, in the _fifth_ measure, and not in the fourth.

Its form is therefore irregular.
In No.

2 (from the first pianoforte sonata), the first phrase ends with the fourth measure, obviously, for the evidence of a new "beginning" in the following measure is perfectly clear; the phrase is therefore regular.

But the next phrase runs on to the _sixth_ measure from this point (the tenth from the beginning of the whole), because there is no earlier evidence of an "ending." Observe that the first phrase has a preliminary quarter-note, the second phrase none.