Is 縦と横が the subject?

Japanese Language Grammar
1

Hi!

In the following article, from News Web Easy, I have trouble with the sentence in yellow.
ライトは縦と横が30cmぐらいの四角形で3つあります。
I more or less understand that there are three beams of light, emitted from 30 x 30 cm square sources. I have even found a photo to help me understand. The thing is, in the yellow sentence, I have problems with the subject. I assumed it is 縦と横が but it doesn´t really make sense, doesn’t it? I can’t see which verb would 縦と横 be the subject of.
Can you help me with the structure of the sentence?

ufos
ufos1592×342 38.6 KB

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2

I’d say it means that the “height and width” is 30cm.

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3

It would be as if there were a です omitted?

4

That’s weird, i just finished reading this one too! I took it as the height and width is approx 30cm too. The height/width being the key info marked by ga? And あります to mark existence.

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5

This is using te-form to link two sentences; if you pull them apart you get:

  • ライトは縦と横が30cmぐらいの四角形です
  • (ライトは)3つあります

(i.e. the で in the original sentence is the te-form of the copula です/だ).

Hopefully you can see the structure of the two separate sentences.

If not: In the first one there’s an embedded sentence – 縦と横が30cmぐらい modifies 四角形 (via the の). The outer sentence is XはYです.

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6

I can see!! Brilliant explanations, thanks a lot!!! I always mistake the particle で with the て-form of です… always.

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