适当形式填空 I heard him （ ）(sing)in the next room.答案写的是sing,但为什么不写singing呢?

适当形式填空 I heard him （ ）(sing)in the next room.答案写的是sing,但为什么不写singing呢? I ______(ask) him a question yesterday.适当形式填空 用适当形式填空 I felt excited when I heard people ______（talk） nearby. I haven't heard from my sister ----------（recent).用所给单词的适当形式填空 I know him but he doesn’t know ( ) (I)用括号内的适当形式填空 I'd like (make)a model plane for him 适当形式填空 when I saw him,he__(play) with other boys.play的适当形式填空 用单词适当形式填空 I argee with him ----------------(complete).We have many things in common. I always help him ____(do) his homework.【用所给词的适当形式填空】 i like him because hes_(friend) 给锁给的适当形式填空. I believe he can understand it after _________(talk) to him 用适当形式填空 I——（telephone)him tomorrow用所给动词的适当形式填空 I heard someone________ (cry) in the next room a moment ago.用所给词的适当形式填空. I heard that he was -------(terrible) ill last week.[用所给词的适当形式填空] I heard someone_______(cry)in the next room a moment ago用适当形式填空应当填什么? I heard Tommy ____ in his room just now .(sing) 用所给词的适当形式填空 I______[tell]him the news when I see him at the offic.用所给词的适当形式填空 I(stay) with him for only two hours,but i enjoyed the short(stay) very much适当形式填空