Ellard is astounded that Charlie doesn't seem to have basic knowledge
Start: Don't tell me you've never seen a knife. Knife. That's a knife. Use it to cut things. Cut things.
End: Can - you - say - "fork"? "Faw-werk"? "Faw-werk." [...] Two parts. "Faw-werk." [...] Right. Put 'em together. "Faw-werk" [...] Good! That was great!
For full extended monologue, please refer to clips or the script edition cited here: Shue, Larry. The Foreigner, Dramatists Play Service Inc. Acting Edition, 1985, pp 39.