ADJ

firm, solid, sound

VERB + BASIS

form, provide

PREP

~ for
The proposal provides a sound basis for a book

PHRASES

have no basis in sth
These allegations have no basis in fact

ADJ

whole

PREP

on the ~ of
We made our decision on the basis of the information we had
~ for
The whole basis for your argument is false

ADJ

regular
daily, monthly, weekly, etc.
Staff are employed on a monthly basis
permanent, temporary
casual, part-time, voluntary
commercial

PREP

on a … ~