Мы используем can I …: Can I help you? Can I do that for you? Кроме этого может использовать shall I …: Shall I help you with that? Shall I call you on your mobile? We sometimes say I can ... or I could ... or I'll (I will) ... to make an offer: I can do that for you if you like. I could give you a lift to the station. I'll do that for you if you like. I'll give you a lift to the station. We use would you like (to) ... for invitations: Would you like to come round tomorrow? Would you like another drink?