Doubly weak verbs (رأى، روى، نوى)

رأى: the hamza disappears

In the past رأى is regular: رأيتُ, رأتْ, رأوا. In the present the hamza drops: يرى, ترى, نرى. After لم the final alif goes too: لم يرَ.

pastpresentafter لم
Iرأيتُأرىلم أرَ
you (f.)رأيتِتَرَيْنَلم تَرَيْ
heرأىيرىلم يرَ
theyرأَوْايَرَوْنَلم يَرَوْا

روى، نوى: و in the middle, ى at the end

Here the middle و acts like an ordinary consonant, and the end acts exactly like مشى / يمشي.

روى to narrateنوى to intend
I (past)رَوَيْتُنَوَيْتُ
they (past)رَوَوْانَوَوْا
he (present)يَرْوييَنْوي
they (present)يَرْوونَيَنْوونَ
after لملم يَرْوِلم يَنْوِ

شوى to grill, كوى to iron and طوى to fold go the same way: يشوي, يكوي, يطوي. The command is اِرْوِ, like امشِ.

وفى: weak at both ends

وفى ب(wafâ bi) to keep (one's word) starts with و and ends with ى. The present drops the و, like وصل / يصل, and ends like يمشي: يفي. After لم only one root letter is left: لم يفِ.

Contributors