at different grades可以换成at a diffrent grade吗

at different grades可以换成at a diffrent grade吗 in different grades翻译 they are in different grades同义句 in different grades中文意思是什么 we are in the same school,but in different grades.“grades”为什么要加s They are in different grades改为同义句 My heaith makes a big ______to my grades. (different) We are in different grades.同义词转换 We are.inWe are in different grades.同义词转换 We are.in...same grades. we are () the USA A in B from C at But now we are in () A England B China C AmericaBut we are in different () A grade B class C grades at different times of at different school还是in different school Tom's grades _(frustrate) his parents at that time same,we,school,are,grades,different,in,in,the,but(连词成句） we are in different grades .用same 改写）We are __in ____same___ . A healthy lifestyle makes a big ____ to my grades.A,different B,difference C,differences people at different ages对吗?at? There are different forms of t_ at different times. 1、同意句转换 We are not in different grades.We1、同意句转换We are not in different grades.We are in the (.)( ).2.请问enjoy 的单三形式是什么?