是talking on the phone 还是 over

是talking on the phone 还是 over He is talking with my mother on the phone.句中的on能换成over吗 1.Talking on the phone for over 30 minutes ______ be as harm My sister is talking on the phone He is talking on the phone.翻译 They are talking on the phone. 是in the phone还是on the phone on the phone还是by the phone over the phone和on the phone哪个对 she is on the phone,为什么不用she is talking on the phone,区别是什么, be on the phone 和be talking on the phone意思一样吗 who are you talking to on the phone?on the phone做什么状语