Are you in Grade Seven?

i am in grade eight,not grade seven.那are you in geade seven Are you in Class One .Grade Seven?(作否定回答) Are you in Grade 是we are all in （Grade） seven还是we are all in （grade) seven 请问：英文中的年级是否大写,如：Are you in ( ),( A.Class three,Grade seven Jim and Tony are in Grade Seven.对in Grade Seven提问 which grade are you in which grade are you in? Are you in grade four? Are you in Grade Five? are they in grade seven?做否定回答 are you in grade 的意思