一、mike will 【be】a policeman。be动词填什么
be 之所以用原型 因为will固定用法 后面接be动词原型
二、助动词后面加be动词原形可以吗
有些可以加
最常用的助动词有：be, have, has, do, does, shall, did, will, should, would等
例如
it will be rainy tomorrow
三、三极管电路中，rbe(be为脚码)是什么意思？怎么定义的？
rbe是BJT晶体管的输入电阻，其定义是BJT输入特性曲线的斜率，即输入的发射结电压增量与基极电流增量的比值，脚码b代表基极，e代表发射极，rbe就代表基极到发射极之间的动态电阻。
四、助动词be+及物动词的过去分词和情态动词+be+及物动词的过去分词结构的被动语态句子8句
I was born in1994.
Trees were planted by people.
Flowers were watered by her.
I was invited by him.
Computers were used by us.
The scarf was bought by me.
Pens were used to write.
The bike was broken.
Trees must be planted for sand storm.
Cigarettes mustn't be smoken .
A new book can be found by me.
Our homework must be done by us .
The meeting must be held by them.
The housework must be done by my mother.
Breakfast must be eatten by us.
The book can be read by many people.
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