也都 (also all of them)

"Both, all of them too"

• also也yěall / both都dōu stacks two sweepers: also也yě (also) + all / both都dōu (all).
• they他们tā menalso也yěall / both都dōuto come来lái(completed / change)了le = "they all came too."
• also也yě ties back to an earlier group; all / both都dōu sweeps in this whole one.

… also也yěall / both都dōu + Verb / Adj

• also也yěall / both都dōu = "also all (of them)".

they他们tā menalso也yěall都dōucome来lái了le。

• they他们tā menalso也yěall / both都dōuto come来lái(completed / change)了le = "they all came too."

Order matters: also也yě before all / both都dōu

• It's also也yěall / both都dōu, never all / both都dōualso也yě.

Recap

Read the full reference: HSK 4 grammar — Adverbs.