给他爸爸用英语怎么说

在英语中，给他爸爸说话可以用以下几种表达方式：
"Speak to his father" 或 "Talk to his father"，表示与爸爸交谈。
例句：
"Can you speak to his father for me?"（你能帮我和他爸爸说话吗？）
"I need to talk to his father about the arrangements for the wedding."（我需要和他爸爸谈谈婚礼的安排。）
"Say something to his father" 或 "Say something to him"，表示对爸爸说些什么。
例句：
"Can you say something to his father for me?"（你能帮我转达给他爸爸吗？）
"I need to say something to him about the plans for the weekend."（我需要和他谈谈周末的计划。）
"Tell his father"，表示告诉爸爸某事。
例句：
"Can you tell his father that I won't be able to make it to the meeting?"（你能告诉他爸爸我不能参加会议吗？）
"I need to tell his father about the changes to the schedule."（我需要告诉他爸爸时间表的变化。）
总之，在英语中，我们可以用 "speak/talk to", "say something to", "tell" 这几种表达方式来表示对他爸爸说话。