Modals should be followed by a bare infinitive.

Wrong: *She can comes.

Right: She can come.

In example 1, the verb in the simple past form “found” cannot be used because bare infinitives (i.e. “find”) should be used after modal verbs (i.e. “can”).

 

WRONG
RIGHT

Due to Hong Kong’s prosperity, you can found anything you want from the health industry.

Due to Hong Kong’s prosperity, you can find anything you want from the health industry.

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