In this passage the earliest text has an initial subordinate conjunction (as) that is never completed by a main clause. The committee for the 1920 LDS edition removed the as, thus making the subordinate clause into an independent one. Yet interestingly, the following text (verses 12–14) has an incomplete as-clause that has never been edited:
As noted in the discussion under 1 Nephi 8:7, there has been a strong tendency to editorially delete the subordinate conjunction as in order to remove incomplete sentences from the text. The critical text will restore virtually all such instances, providing they are supported by the earliest textual sources. Also see the discussion regarding this usage in Enos 1:26–27.
Summary: Restore the original subordinate conjunction as in Mosiah 2:11, even though the resulting text remains incomplete; a similar incomplete as-clause is found in the next verse (Mosiah 2:12), but this as has never been editorially removed from the text.