2. Show me that.
The subordinate clause in #1 is linked to the main clause by the subordinate conjunction how, which functions as an adverb: to analyse a sentence how? To analyse a sentence thus. The subordinate clause is a non-finite (infinitive) clause and it acts as the direct object of the verb show. Show what? Show that. Show how to... .
me is the indirect object; it is the thing to whom the direct object (instructions: how to analyse a sentence) is given.
Student or Learner