The villagers had many trees ___ ( plant ) just then .They managed to make themselves ___ ( understand ) in very simple Eng .I heard the song _____（sing） in English .I heard her ___ (sing) the song in Eng.I saw him ___( open )the window .I saw th

The villagers had many trees ___ ( plant ) just then .They managed to make themselves ___ ( understand ) in very simple Eng .I heard the song _____（sing） in English .I heard her ___ (sing) the song in Eng.I saw him ___( open )the window .I saw th
The villagers had many trees ___ ( plant ) just then .
They managed to make themselves ___ ( understand ) in very simple Eng .
I heard the song _____（sing） in English .
I heard her ___ (sing) the song in Eng.
I saw him ___( open )the window .
I saw the window ___( open ) .
同个类型的问题 、
麻烦说下思路 、

The villagers had many trees ___ ( plant ) just then .They managed to make themselves ___ ( understand ) in very simple Eng .I heard the song _____（sing） in English .I heard her ___ (sing) the song in Eng.I saw him ___( open )the window .I saw th
planted
understood
sung
singing
opening
opened
对自己来说,动作是主动的,用原型或ing型；
对别人/物体来说,动作是被动的,用ed型

补充：
I heard the song _____（sing） in English .
being sang

to plant：不定式作目的状语“有许多树要去种”
understood：make oneself understood使某人被理解，make后用过去分词表示被动。
singing：感官动词（看、听等）+宾语+动词原形或动词现在分词。用现在分词表示看见或听见全过程，用原形表示经常性看到或听到。
opening：同上。
open：感官动词+宾语+形容词，open本身...

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to plant：不定式作目的状语“有许多树要去种”
understood：make oneself understood使某人被理解，make后用过去分词表示被动。
singing：感官动词（看、听等）+宾语+动词原形或动词现在分词。用现在分词表示看见或听见全过程，用原形表示经常性看到或听到。
opening：同上。
open：感官动词+宾语+形容词，open本身可以做形容词。

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