No it's yafta7(u) and yaktub(u) , leave the "u" off in pause form.I am having some trouble with some words and it basically has to do with vowels that do or do not occur between the second and last letter or 3 letter masdars. Heres an example:
I am told this is يفتح "yafatah" but this is يكتب is yaktab. Is there a rule for this?
Your response was very clear and easy to understand as always.I hope this clarifies more than it confuses. In the final analysis, students are encouraged to memorize verbs with their respective vowel combinations as well as their masdars e.g. نصَر - ينصُر - نصراً (perf - imperf - infin).