Questions & Answers about قست الباب قبل النقلة.
What does قست mean grammatically in this sentence?
قست is the past tense, first-person singular form of the verb قاس / يقيس, meaning to measure.
So قست = I measured.
The -ت ending tells you the subject is I, so Arabic does not need a separate word like أنا unless you want extra emphasis.
Why is it قست and not something like قاست?
This happens because قاس is a hollow verb in Arabic, meaning its middle radical behaves differently when endings are added.
In these verbs, the long vowel often shortens or disappears when you add person endings in the past tense.
For example:
- قاس → قست = I measured
- شاف → شفت = I saw
- جاب → جبت = I brought
So قست is the normal form, not a shortened version of something else.
Why is there no word for I in the sentence?
Because the verb already includes the subject.
In قست, the ending -ت tells you that the subject is I. This is very normal in Arabic.
So:
- قست الباب = I measured the door
- أنا قست الباب = I measured the door