对their提问用单数还是复数

对their提问用单数还是复数 用who提问,be动词用单数还是复数 a tube of toothpaste 用单数还是复数提问 a tube of toothbrush 用单数还是复数提问? lesson提问时用单数还是复数,taining是可数? a bar of soap 用单数还是复数提问? traffic是单数还是复数用单数还是复数 diary用复数还是单数? Anything用单数还是复数 英语翻译用单数还是复数? everyone has their own _(way) of relaxing在这里way 用单数还是复数 关于 their lifetheir life是单数还是复数形式? their own 后加单数名词还是复数名词? their own 后名词为单数还是复数 The girl are singers 改成单数形式的句子 将下列句子复数改为单数,单数改为复数The girl are singers.The ______ _______ _______ ________.Their classrooms are big.对划线部分（big)提问 划线部分是主语的如果提问?谓语动词用如何选择单复数?I play the flute everyday.对主语提问时谓语动词用单数还是复数？we are good friends. 在对主语部分提问时,若主语是复数,那么be动词用单数还是复?如：They are my brothers.对they提问,是who is your brother?还是who are your brothers? everyone是强调单数还是复数?谓语动词应该用什么为什么 Everyone uses a pen.和Will everyone send their homework by email?都对?我主要是不明白第二句为什么能用their 动词是send我知道