按要求完成下列句子。We are making a model plane. (变成一般疑问句)
_____________________________________________________________________The boys are sitting under the tree.(对划线部分提问)
_____________________________________________________________________Look out of the window. (改为否定句)
_____________________________________________________________________We can see some birds over there. (对画线部分提问)
_____________________________________________________________________The children have some apples. (改为单数句子)
_____________________________________________________________________