play along
US /pleɪ əˈlɔŋ/
UK /pleɪ əˈlɔŋ/

1.
合わせておく, 同調する
to pretend to agree with someone or something, especially in order to keep them happy or to get more information
:
•
I didn't agree with their plan, but I decided to play along for now.
彼らの計画には同意しなかったが、とりあえず合わせておくことにした。
•
Just play along with him; he's easily upset.
彼に合わせてあげて。彼はすぐに怒るから。