Watch the 1, 2, 3 Bossa Solo online guitar lesson by Frank Vignola from Essentials: Jazz Standard Soloing
This is an AABA form. The only difference with this one is the B section is 16 measures long instead of the usual 8 measures. Most standards in the AABA form are 32 measures divided equally into 8 measure sections. This classic progression is 40 measures long, with the A sections all being 8 measures and the B section or bridge at 16 measures long.
Notice I make a musical statement, then build or alter that statement a bit either rhythmically or using different notes, then finishing up the phrase. I'm thinking in 8 measure phrases instead of one and two measure phrases. When we think over the length of a section, we can take our time to develop a melodic solo.