回答

・call out
・greet

「打招呼」可以用英文は call out 或greet 來表達。

A child was crouching by himself in front of the station, so I thought he might be lost, so I called out to him.
（我看到一個孩子獨自蹲在車站前，我以為他可能迷路了，於是我向他打招呼。）

When I was drinking alone at the bar, I felt lonely, so I greeted to the woman who was drinking alone next to me, but she ignored me.
（我在酒吧獨自喝酒感到孤獨，於是我向旁邊獨自喝酒的女士打招呼，但她沒有理睬我。）

希望以上說明能夠幫助到你。

有幫助｜0