Yet another as vs. like

[callmemo]

a) Timothy talks (like/as) his friends do?

b) The joint-venture contract covers such questions (like/as) the division of profits and costs.

[bmlaud]

Both should use 'as'.

[awesomeusername]

For making comparisons (i.e., asserting that one thing is similar
to another), the prescribed choices are:

1. A is like B.
2. A behaves like B.
3. A behaves as B does.
4. A behaves as in an earlier situation.

In 1 and 2, "like" governs a noun (or a pronoun or a noun phrase).
In 3, "as" introduces a clause with a noun and a verb. In 4, "as"
introduces a prepositional phrase. Look at what the word
introduces, and you will know which to use.

https://alt-usage-english.org/excerpts/fxlikevs.html

[lijupillai]

So going by this explanation I would guess
1 - Like
2 - As

[awesomeusername]

Actually, (a) fits condition 3.

Timothy talks AS his friends DO.

A behaves AS B DOES.

You can never put a complete thought, or clause, after LIKE. Here, "his friends do (talk)" is a clause. It has a subject and a verb. Therefore, it CANNOT be after "LIKE".