Evangelicals and other Trinitarians often cite Matthew 28:19 as support for the Trinity.
19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,
It is thought by these individuals that the singular form of “name” somehow suggests that God is “one” and not “three.” There are a few ways to go about handling this from a LDS perspective (so what if it emphasizes the unity of the Godhead?), but I think the best I have seen to date is the following which was posted by an anonymous poster named MormonMason responding to evangelical criticism at MADB:
I would not make too much of the grammar in this passage as many evangelicals often do. You and most evangelicals who make the above argument seem to forget that Jesus was speaking Aramaic at this time and that this language is a Semitic language with similar grammatical rules to Hebrew in much of the language. The singular “name” is acceptable grammar when referring to more than one person. See for example the similar grammar at Genesis 5:1-2 and Ruth 1:2:
Genesis 5:1-2 1 This is the book of the generations of Adam. In the day that God created man, in the likeness of God made he him;
2 Male and female created he them; and blessed them, and called their name Adam, in the day when they were created.
Ruth 1:2 And the name of the man was Elimelech, and the name of his wife Naomi, and the name of his two sons Mahlon and Chilion, Ephrathites of Beth-lehem-judah. And they came into the country of Moab, and continued there.