The children asked their teacher whether/if she/he would sing a song for them
这里孩子们说的是一个要求,所以用ask,如果说的是一件事,可以用say that或tell sb that之类的句型,问句中是一般疑问句,所以用whether/if 来引导,另外还要注意改称相应的人称
The children asked their teacher whether/if she/he would sing a song for them
这里孩子们说的是一个要求,所以用ask,如果说的是一件事,可以用say that或tell sb that之类的句型,问句中是一般疑问句,所以用whether/if 来引导,另外还要注意改称相应的人称