1
My brother selled his old bike yesterday.
My brother sold his old bike yesterday.
Sell is an irregular verb. Its past simple is sold, not selled: ‘She sold her car last week.’
2
This house is for sell.
This house is for sale.
These shoes are on sell this week.
These shoes are on sale this week.
Sell is a verb: ‘They sell clothes.’
Sale is a noun. Use for sale when something is available to buy: ‘Their house is for sale.’
Use on sale when something is available at a lower price: ‘These shoes are on sale.’
3
I sold to my neighbour my old bike.
I sold my neighbour my old bike.
I sold my old bike to my neighbour.
Sell is one of the verbs that can have two objects: a person and a thing.
Use sell + person + thing: ‘She sold me her car.’
You can also use sell + thing + to + person: ‘She sold her car to me.’
Do not put to before the person when the person comes immediately after sell.
Use for before the price: ‘She sold her car for €2,000.’