  Comparing the capture cross sections calculated without the breakup effect
and experimental complete fusion cross sections, the breakup was analyzed in
reactions with weakly bound projectiles $^{6,7,9}$Li, $^{9,11}$Be, and
$^{6,8}$He. A trend of a systematic behavior for the complete fusion
suppression as a function of the target charge and bombarding energy is not
achieved. The quasielastic backscattering is suggested to be an useful tool to
study the behavior of the breakup probability in reactions with weakly bound
projectiles.
