Loren T. Stuckenbruck, in Angel Veneration and Christology: A Study in Early Judaism and the Christology of the Apocalypse of John (Tubingen: JCB Mohr, 1995),lists a number of biblical passages in which the singular Greek pronoun or third person singular verbs seem problematic.
He apparently concludes that the Lamb is being worshiped alongside God in a "monotheistic framework" when we encounter such usages. But I am not so sure the examples that he provides support his point. Let us examine Revelation 11:15 as a case example:
"The kingdom of the world did become the kingdom of our Lord and of his Christ, and HE will rule as king forever."
Grammatically, John's use of BASILEUSEI ("will rule") could refer to God or Christ. Stuckenbruck thinks that it refers to both the Messiah and the Lord Almighty (Jehovah) as a unit. But grammar does not necessitate that we read the text in a Trinitarian manner. Furthermore, the context suggests that it is YHWH (the Father), who will rule as King forever and ever (Rev 11:16-17).
Even if one objects to the NWT's use of the Tetragrammaton in Rev 11:16-17, the surrounding verses still manifestly indicate that KURIE, hO QEOS or hO PANTOKRATWR takes up HIS great power and begins to rule as King through His Messiah, who clearly is not the Lord in this context.