התפעל is probably the most easily recognizable of the verb forms:

In the past tense, it almost always has four syllables, as in the word, הִתְקַלַּחְתִּי (I took a shower). This rule is true for all conjugations in the past tense, except for one the הוא variation.

In the present and future tenses, there is an ee-ah-eh vowel rhyming pattern.

Like the פִּעֵל, the התפעל usually has a דגש (dot of emphasis) in the second letter of the root.

Witness these patterns as you review the chart below, which lays out all the possibilities of the verb לְהִתְקַשֵּׁר (to speak) in past, present, future and imperative (command) tenses: