「〜ましょう」proposes doing something together — "Let's ~" or "Shall we ~". Structure: verb masu-stem ＋ ましょう ✅ Issho ni benkyō shimashō. (Let's study together.) ✅ Sorosoro kaerimashō. (Let's head home soon.) ✅ Hajimemashō ka? (Shall we begin?) Compare: ・ましょう＝"Let's ~!" (active, assertive proposal) ・ましょうか＝"Shall we ~?" (softer, asking for confirmation) ・ませんか＝"Wouldn't you like to ~?" (respects the other's preference) 💡 ましょう is more assertive than ませんか