Are you eating your lunch?
答句：Yes.I am/No.I am not .

be动词疑问句：将be动词放主语前，句尾加？
be动词疑问句可以用yes or no回答。
问句格式：Am/Are/Is+主语…？
答句格式：yes,主语+am/are/is.No+主语+am/are/is+not.
(例)Is that man your math teacher?
答句：Yes,he is./No,he is not./No,he is my PE teacher.

第二人称（you）/复数名词+are
（例）you are my sons
第三人称单数/单数名词+is
(例) He is my student
be动词的否定句am/are/is+not
肯定句：主语+am/are/is…
否定句：主语+am/are/is+not…

be 动词（状态/存在）的现在式-an,are,is翻译为：是，在(he is in American)。主语+be动词。第一人称（I）+am=I am a boy。

good morning,guys😀