bash doesn't autocomplete some things

[Hollman Enciso]

Binary package hint: bash

my bash doesnt autocomplete some thing.

example:

sudo apt-get - the bash autocomplete me this but
sudo apt-get install package - doesnt autocomplete me the install and soome package that strat with example pidg doesnt sutocomplete

But whet i navigate or edit some file/directory works, for example cd /etc/ ls /var gedit .bashrc

y uncoment the lines .bashrc but the problem continue

if [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
fi