1. It usually happens that when a Praeformative letter of a verb has the vowel Tsaree ( ֵ ) under it, the letter י (seldom ה ) has been dropped; as וַתֵּלֶד from וַיֵּדַע ; יָלַד from וַתֵּרֶא ; יָדַע from רָאָה.
2. When the Praeformative has a Kaumets (ָ ) under it, ו or the doubled radical has been dropped; as וַיָּקָם from וַתָּבֹא ; קוּם from וַיָסָב ; בּוֺאfromסָבַב.
3. When a Dageshfollows the Praeformative, נ has been dropped; (but see § 30.)
4. In other cases, the radical ה has been dropped.
Note 1. In a very few cases a Dagesh shows a י dropped.
Note 2. A Dagesh in the first sometimes in the second radical frequently shows the absence of the doubled radical; as יִסֹּב and יָסֹבּוּ from יָשֹׁכּוּ יִשֹׁךְ ; סָבַב from שָׁכַךְ.
Note 3 A few verbs whose second and third radicals are alike, have a Tsaree under the Praeformative; as וַיֵּקַל , וָאֵקַל , וַתֵּקַל from קָלַל.
N. B. The verbs אֵבוֹשָׁה אֵבוֹשׁ , יֵבוֺשׁוּ , יֵבוֹשׁ etc. come from בּוֹשׁ ,notיָבֵשׁ.
Note 4. Verbs beginning with הֹ) הוֺ , (מֹ) מוֺ , (הֹ) (אֹ) אוֺ , (נֹ) נוֺ (תֹ) תוֺ , (יֹ) יוֺ) or אוּ נוּ , מוּ , תוּ ,( יֻ ) יוּ , הוּ are <from> verbs whose first radical is י י. See § 51.
Note 5. Some roots lose their א at the beginning; and some lose their א at the end; as הָכִיל from וַתֹּסֶף , יוֹסֵף ; אָכַל from מָלוּ ; אָסַף from מָצָתִי ; מָלֵא from מָצָא [p. ]