au/en/aux, ce/cet/cette/ces, du/de/des/d' (french grammar)

this/that - masc sing

ce

this/that - masc sing before a vowel or mute h

cet

this/that - fem sing

cette

these/those

ces

to/in - masculine country

au

to/in - plural country

aux

to/in - feminine country

en

from/of the - masculine

du

from/of the - feminine beginning with vowel/d'

d'

from/of the - feminine or general

de

from/of the - plural

des