TAX
tax (noun) - You have to pay your income tax.
taxes (plural) - There are too many taxes in Canada.
sales tax
tax (verb)
The government taxes goods at 13% in Ontario.
(past)
The government taxed cigarettes at a higher rate.
(future)
They will tax alcohol at a higher rate.
(progressive) taxing
The government is taxing cigarettes at a higher rate.
[ tacks ]
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TAXI
taxi (car that you rent)
plural - taxis
verb - airplane moving on the ground
to taxi
The airplane is taxiing.
the airplane taxied for 10 minutes before it took off.
The plane taxies before takeoff. < I forgot the 'e' ... English is a terrible language :)
Planes taxi before takeoff.