Yes -
Hebrews 1 is an example: The psalm paul quotes says "Your throne oh God is forever" (YHWH talking to Christ) Freddie changed this to "God is your throne to time indefinite" and then changed the psalm to say the same thing.
Grammatically the verse is talking about "your throne" not God.
There is a good pamphlet on the NWT, concentrating on Colossians showing the grammatical errors and deliberate changes to the text.