作业帮第一道题是这样的,Where is Tom,do you know?No,but I heard ______ in his room a few minutes ago.A.him sing B.him singing C.he was singing D.All the answers are right第二道题是一个介词,They often sell the oranges_____ 3 yuan a kilo.
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第一道题是这样的,Where is Tom,do you know?No,but I heard ______ in his room a few minutes ago.A.him sing B.him singing C.he was singing D.All the answers are right第二道题是一个介词,They often sell the oranges_____ 3 yuan a kilo.
第一道题是这样的,Where is Tom,do you know?
No,but I heard ______ in his room a few minutes ago.
A.him sing B.him singing C.he was singing D.All the answers are right
第二道题是一个介词,They often sell the oranges_____ 3 yuan a kilo.
第一道题是这样的,Where is Tom,do you know?No,but I heard ______ in his room a few minutes ago.A.him sing B.him singing C.he was singing D.All the answers are right第二道题是一个介词,They often sell the oranges_____ 3 yuan a kilo.
1.A由情景知道,他刚才正在唱歌,因此用hear sb doing
2.for当出现price这个单词使用at,否则金钱前用for
1.B.him singing
感观动词(hear, feel...)+sb.+doing sth. 表示一个正在进行的事情(有一个进行的概念)
感观动词(hear, feel...)+sb.+do sth.知道某人做某事,则没有进行中的概念.
2.at
价格是sell at a price of
A
hear sb do 或者hear sb doing
前者表示做过 后者表示正在做
for
B hear sb doing 是指进行的动作，而hear sb do 则是指已完成或经常进行的，所以选B
FOR 因为是指以多少价格售出，用FOR
B
1.hear sb do sth
如果是hear him sing表示说话人听他唱歌一直听到他唱完，也就是他整个唱歌的过程说话人都一直在听。
2.hear sb doing sth
如果是hear him singing表示说话人在某一时刻听到他唱歌，但没有听到他把歌唱完。（强调此时他在做什么事）
结合语境可知，说话人只是在几分钟前可能是路过TOM的房间...
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B
1.hear sb do sth
如果是hear him sing表示说话人听他唱歌一直听到他唱完，也就是他整个唱歌的过程说话人都一直在听。
2.hear sb doing sth
如果是hear him singing表示说话人在某一时刻听到他唱歌，但没有听到他把歌唱完。（强调此时他在做什么事）
结合语境可知，说话人只是在几分钟前可能是路过TOM的房间时听到TOM在唱歌，只是一个瞬间的动作，所以用hear him singing。
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C
for
第一个选A,hear sb do 表示听到某人做某事但已是过去的动作,
hear sb doing sth
表示听到某人正在作某事
二个填 by
B
at
hear sb do 表过程
hear sb doing 表正在进行