3. Those whose termination is eau append x in the plural, as:

Singular.
beau,
nouveau,
Plural.
beaux, beautiful.
nouveaux, new.

4. Those ending in al change this into aux, as:

Singular.
libéral,
rural,
Plural.
libéraux, liberal.
ruraux, rural.

5. N. B.--The following, though ending in al, come under the general rule:

Singular.
amical,
bancal,
fatal,
final,
frugal,
filial,
glacial,
Plural.
amicals, friendly.
bancals, bandy-legged.
fatals, fatal.
finals, final.
frugals, frugal.
filials, filial.
glacials, frozen, icy.
Singular.
initial,
labial,
matinal,
médial,
naval,
penal,
théatral,
Plural.
initials, initial.
labials, labial.
matinals, early.
médials, medial.
navals, naval.
penals, penal.
théatrals, theatrical.

§ 16. Comparison.

1. Examples will best show this feature of the language.

Aussi ... que ..., as ... as ..., as much ... as ...; si ... que ..., as ... as ...; autant ... que ..., tant ... que ..., as much ... as ..., so much ... as ...