preposition
BAD : Inside of the wallet there should be £20 and my Visa Card.
GOOD : Inside the wallet there should be £20 and my Visa Card.
◆◆◆
inside sth (WITHOUT of ): 'Inside the box was a small silver spoon.'
preposition
BAD : Inside of the wallet there should be £20 and my Visa Card.
GOOD : Inside the wallet there should be £20 and my Visa Card.
◆◆◆
inside sth (WITHOUT of ): 'Inside the box was a small silver spoon.'
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012