Here are some examples of how you could use "grimace" in a compound sentence:
Example 1:
* The child grimaced at the taste of the medicine, but he swallowed it anyway. (This uses a coordinating conjunction, "but", to connect two independent clauses.)
Example 2:
* The comedian told a joke, and the audience grimaced in response. (This uses a coordinating conjunction, "and", to connect two independent clauses.)
Example 3:
* She grimaced at the sight of the accident, so she quickly looked away. (This uses a subordinating conjunction, "so", to connect a dependent clause to an independent clause.)
Example 4:
* Despite his grimace, he agreed to help his friend move. (This uses a prepositional phrase, "despite his grimace", to modify the independent clause.)
These examples show how you can incorporate the verb "grimace" into compound sentences while expressing different ideas about the action itself.