Explaining the Explanation Regarding "THAN HE"

My post about the use of than as a preposition left a reader wondering about some of the grammatical terms used in the explanation:

I’m…a bit unsure about the terms ‘demonstrative pronoun’, ‘conjunction’ and ‘preposition’ in this context. Could you please explain this a little more?

The terms being asked about are from this statement:

The OED has listings for than as a demonstrative pronoun and as a conjunction, but not as a preposition. However, it does include a note about the use of than as a preposition and states that this use “is now considered incorrect.”

demonstrative pronoun

English has four demonstrative pronouns: this, that, these, and those. Like any pronoun, a demonstrative pronoun stands for a noun. At the same time, it serves to point out or separate the noun it stands for from other objects:
This is the one I meant.
Those are yours.
May I have these?
Give me that!

The OED entry for than as a “demonstrative pronoun” documents an obsolete use in which than was used where we now use that.

preposition

English has many prepositions. They are those little words that show a connection of some sort between a noun that follows it and another word in the sentence:
That is the pen of my aunt. The preposition of relates “aunt” to “pen,” indicating ownership.
The cat sat on the mat. The preposition on relates “mat” to “sat,” indicating a spatial relationship.

The noun that follows a preposition is said to be “governed” by it.
I sat by my father. The noun “father” is governed by the preposition “by.”

When the word governed is a pronoun, the pronoun will be in the objective case: I sat by him. Him is the object form of he.

conjunction

Conjunctions are used to connect clauses or sentences:
You may go with your friends after you have finished your homework. After is a conjunction introducing the second clause which tells “when” about the verb may go in the main clause.

Conjunctions are used to co-ordinate words in the same clause:
Take your books and your papers. And joins book and papers, words of equal importance.

The conjunction than is used to introduce comparative clauses. The problem in the “than he/than him” controversy is that the second clause often remains unexpressed:
Charlie is taller than I.
You are kinder than he.

English speakers of a certain age have learned to provide the missing clause mentally:
Charlie is taller than I [am tall].
You are kinder than he [is kind].

Reader Rob Baker defends the use of the object form “him” after “than” in certain contexts:

Sometimes “than him” is correct:
She likes Johnny Depp more than he (does).
She likes Johnny Depp more than him (more than she likes him).

This is a valid defense of “than him.” However, the “correctness” of the second example depends entirely upon context. The speaker’s meaning of the “him” would be clear enough in conversation, but in writing, it would be ambiguous. It would also sound like nonstandard English.

Another reader, Gloson, offers this suggestion:

Just don’t use “than he” or “than him”. Simply just use “than he is”.

This is sound advice. In writing especially, if a few extra words are needed to make one’s meaning clear, why not use them? For example, the ambiguity of “She likes Johnny Depp better than him,” can be avoided by being specific: She likes Johnny Depp better than she likes Orlando Bloom.

The fact that this is my second post to include a discussion of “than he” vs “than him” should be a clue that this distinction is in the process of breaking down. Until than/him becomes universally acceptable, writers are wise to consider their audience before following the conjunction than with an object pronoun.

SUMBER