Here's how you would use it in a sentence:
* Ewch i'r siop - Go to the shop
* Ewch i'r tŷ - Go to the house
* Ewch i'r ysbyty - Go to the hospital
It's important to note that "ewch" is the plural form of the verb "go". For a singular subject, you would use ewch chi.
Example:
* Ewch chi i'r parc - You go to the park.