在英语中,初一的意思是 "grade one" 或者 "first grade." 这个词来自于汉语中的 "初一," 其中 "初" 意思是 "first","一" 意思是 "one."

下面是一些例句:

My son is in grade one this year. (我儿子今年在初一。)
She started first grade when she was six years old. (她六岁就开始上初一了。)
I remember my first day of grade one. (我记得我初一的第一天。)

希望这些例句对你有帮助。