by a passing plane,和by a knock at the door1.he strated to complainthis wicked world but was interrupted by a knock at the door.2.i think this house must be koncked down by a passing plane为什么加a不是by后不加a吗?

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by a passing plane,和by a knock at the door1.he strated to complainthis wicked world but was interrupted by a knock at the door.2.i think this house must be koncked down by a passing plane为什么加a不是by后不加a吗?
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by a passing plane,和by a knock at the door1.he strated to complainthis wicked world but was interrupted by a knock at the door.2.i think this house must be koncked down by a passing plane为什么加a不是by后不加a吗?
by a passing plane,和by a knock at the door
1.he strated to complainthis wicked world but was interrupted by a knock at the door.2.i think this house must be koncked down by a passing plane为什么加a不是by后不加a吗?

by a passing plane,和by a knock at the door1.he strated to complainthis wicked world but was interrupted by a knock at the door.2.i think this house must be koncked down by a passing plane为什么加a不是by后不加a吗?
介词 by 后面的宾语各种各样,加 a/an 表达“一个”毫无问题啊,比如：
The following program will be presented by a group of well known scientists.一群著名科学家
This film is directed by an American.一个美国人

通过一辆经过的飞机
通过一次敲门
是抽象名词具体化

by a plane 和take a plane by plane 和take a plane的区别 by a passing plane,和by a knock at the door1.he strated to complainthis wicked world but was interrupted by a knock at the door.2.i think this house must be koncked down by a passing plane为什么加a不是by后不加a吗? take a plane和by plane和 by air 区别 乘坐飞机说成by plane和 take a plane那么可以说成in a plane on a plane,by plane ,by by plane 和 take plane 的用法 Sometimes I think this house will be knocked down by a passing plane.这句话怎么分出从句是什么从句啊 by a plane的意思 track a plane by radar by a plane 与by plane的区别 they go to hainan 【】A.by plane B.by the plane C.by a plane D.in plane they go to hainan( ) A by plane B by the plane C by a plane D in plane选择. by plane. by plane a fox is passing by the tree.的意思 坐飞机英语是介词on a plane还是in a plane不要回答是by plane 或take a plane I'm going to _ to Beijing.A.by plane B.take a plane C.on plane D.take plane We are going to visit Beijing (by air).A.by a plane B.take a plane C.by plane D.by train选择答案替换括号部分