verb
1
BAD : You can travel by train or let a car.
GOOD : You can travel by train or rent/hire a car.
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let = allow someone to live in your house, flat etc in return for money: 'During the holiday season we let the cottage to tourists.'
See note at HIRE (↑ hire )
2
BAD : Do you think your parents will let you go to England?
GOOD : Do you think your parents will let you go to England?
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let sb do sth (WITHOUT to ): 'Why wouldn't Alice let you help her?'
Compare: 'Do you think your parents will allow you to go to England?'