"妈妈" 用英语说为 "mother"。"爸爸" 用英语说为 "father"。"奶奶" 用英语说为 "grandmother"。"爷爷" 用英语说为 "grandfather"。
这些词都是英语本身的词汇，没有外来语的影响。
英文例句及其中文翻译：
"I'm going to visit my mother this weekend." (我这个周末要去看望我妈妈。)
"My father is a lawyer." (我爸爸是律师。)
"I'm going to my grandmother's house for dinner." (我要去奶奶家吃晚饭。)
"My grandfather was a farmer." (我爷爷是农民。)