I
noun
BAD : Political stability provides the base for economic development.
GOOD : Political stability provides the basis for economic development.
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base = (1) the main part of something: 'Most of the paints we produce have an oil base.' (2) the lowest part of something: 'The base of the column is made of marble.'
basis = the very important thing from which something else develops or is made possible: 'The basis of a successful marriage is mutual respect.' 'Newton's discoveries provided the basis for future research.'
II
verb
BAD : The first role play base on a conversation at a hotel reception desk.
GOOD : The first role play was based on a conversation at a hotel reception desk.
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be based on/upon = be developed from: 'Republican policy is based on the idea that people should compete with each other.' 'The film is based on a popular Bengali novel.'