this is my ruler改为复数句肿么改啊?these are his pens.改为一般疑问句 Are those your parents?作肯定回答‘ those are her brothers.改为单数句 【they are】 my grandparents.对括号部分提问 （） （）your grandparents?

this is a ruler 改为复数 This is his ruler(改为复数句) That is my key(改为复数句) These are his brother This is my ruler (改为否定句) This is my ruler.(改为一般疑问句) That's a ruler.对 a ruler 提问.Is this an apple?改为复数句子. ls this your ruler改为复数句 This is my sister.改为复数形式、 This is my brother.(改为复数） This is my friend 改为复数形式 This is my cousin.改为复数形式. this is my teacher.改为复数句子 This is my cousin.(改为复数句) this is my ruler.that is his dictionary.this is my uncle.these are his pens.复数,复数 is this your ruler? 改为复数句 Are these her erasers?改为单数句 1.Those are my books改为一般疑问句2.This is his ruler 改为复数句 3.That is my brother改为复数句4.This is my grandmother用grandparents改为复数形式 5.These are her brothers.改为否定句 6.Those are my books对my books提问.7 Is it your ruler?改为复数句 That is ruler改为复数句 lt is a ruler(改为复数）