The initial idioms of the letter I

important	impose on
impossible	impregnate with
impress as	impress by
impress into	impress on
impress with	impress
impression	imprint on
imprint with	imprint
imprison in	improve on
improvise on	impute to
in(to) shape	in (one's/someone's) tracks
in (one's) dreams	in (one's) favor
in (someone's) bad books	in (someone's) behalf
in (someone's) black books	in (someone's) view
in (someone's) wheelhouse	in (someone's or something's) place
in (the) bud	in your face!