作业帮how long have't you heard from him是 heard from 还是 heard of 还是 hear from & hear of?为什么不是 heard from前面是have 的完成时啊
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how long have't you heard from him是 heard from 还是 heard of 还是 hear from & hear of?为什么不是 heard from前面是have 的完成时啊
how long have't you heard from him
是 heard from 还是 heard of
还是 hear from & hear of?
为什么不是 heard from
前面是have 的完成时啊
how long have't you heard from him是 heard from 还是 heard of 还是 hear from & hear of?为什么不是 heard from前面是have 的完成时啊
确实要用heard过去分词结构.
此处用heard from.
heard from意思是 你多有没有收到他的音讯了.
heard of意思是听说过,听人提起过过,不能用how long
例：Yes,i heard of you.
He is the man you never heard of.
Trends you haven’t heard of – Innovation in College Media.
from
你有多久没有收到他的消息了
hear, hear of, hear from
(1)hear可用作及物动词，表示“听到”、“听见”，侧重于听的结果。如：
I'm very sorry to hear that.听到那件事我非常难过。
Hear后面还可以跟that从句，如：
I hear that you've been here for several years. 我听说你已经来这儿...
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hear, hear of, hear from
(1)hear可用作及物动词，表示“听到”、“听见”，侧重于听的结果。如：
I'm very sorry to hear that.听到那件事我非常难过。
Hear后面还可以跟that从句，如：
I hear that you've been here for several years. 我听说你已经来这儿几年了。
(2) hear of是“不及物动词+介词”构成的词组，意指间接地“听到”“听说”后接名词性质的词。如：
I have never heard of him before. 我以前从来没有听说过他。
注意：hear of与hear about的意义相近，这两个词组在英语中有时可以通用。它们含有“听人说起”，“从书报上看到关于”等意义。例如：
I’ve never heard of him. 我从来没有听说过他。
Have you heard about him from anywhere?你从什么地方听到过他吗？
(3) hear from指“收到……的来信”与get or receive a letter from 同义，其宾语应是人，而不是信。如：
I often hear from my parents.我经常收到父母的来信。
收起
hear from 收到...的来信
hear of 听说
本句的意思:你有多久没有收到他的来信了?
hear from