The strong verbs do not form the preterit with an additional suffix,
but by change of the radical vowel or by reduplication. Thus, we hav
two subdivisions:
1. Ablaut Verbs. The preterit of these verbs is formd without
reduplication. It differs from the present only by a regular change of
the radical vowel, the so-calld ablaut (cp. § 29); e. g., =binda=, _I
bind_, =band=, _I bound_.
2. Reduplicating Verbs. The prt. has reduplication, but no ablaut; e.
g., =halda=, _I hold_, =haíhald=, _I held_.
3. Reduplicating Ablaut Verbs. A smaller number of verbs hav the prt.
both with ablaut and reduplication; e. g., =lêta=, _I let_; =laílôt=,
_I let_ (prt.).