> 1. ni chlywais i 'I didn't hear' (not = ni) > 2. ni chlywais i ddim 'I didn't hear a thing' (not = ni; "dim" added > for emphasis) > 3. ni chlywais i ddim 'I didn't hear (not = ni + dim) > 4. chlywais i ddim 'I didn't hear' (not = dim) > ... Fy enghraifft hoffa yw un sy'n newid ei ystyr yn llwyr trwy ychwanegiad y treigliad llaes: Clywais i'r un peth. I heard the same thing. Chlywais i'r un peth. I haven't heard a single thing. --Mark