各位大蝦好,請教三道關(guān)于英語語言學(xué)的問題（English linguistics )
1.Which of the following two sentences is structurally more comples Which do you think is more difficult for young learners to learn
Sentence A:John sings well.
Sentences B:John is singing
2.The folloing two sentences were produced by children of different ages.Which would you expect from the older child
1) I not hurt him.2) Not the sun shining.
3.判斷正誤：The term used to describe the process whereby a child uses one word like ball to refer to an apple,an egg,a grape and ball is overextension .