Thread: Formation of the imperative for the verb выз/вал

Hey guys, I was taught to form the imperative with these rules:

"The imperative is formed by adding the ending -И to the basic stem. The normal truncation and alternation rules apply.

So, the imperative for the verb говорить would be говори(те)!

The textbook then says "If the и of the imperative is not stressed, it is dropped, and the preceding consonant, except й, takes on a soft sign spelling."

It then provides instructions for the verbs that end in й, but that isn't what is troubling me, so I won't bother copying the instructions on that.

My problem is that the conjugation dictionary on this website says that the imperative for the non-syllabic выз/вал verb is вызови(те)! However, this does not conform to the rules of imperative formation that I was taught. My point here is not to bring attention to a potential error on this website, but to ask for enlightenment on the issue of imperative formation. Тhe verb that I want to form into an imperative has fixed stress on the ы, making me wonder why the imperative is not вызовь, as I initially presumed. For example, the verb начнать has shifting stress, but in the first person conjugation the stress is on the у. In that scenario--at least according to the rules I was taught--the и addition is justified, but not in the case of the выз/вал, whose stress in the first person is on the ы.

Can someone provide some assistance here?

I'm not a professional teacher but I can assume that in this case you should form the imperative according to the verb звать, which, if added a prefix, can form many derivatives - вызвать, назвать, позвать, призвать, созвать and the imperative for all of them will be the same, only the prefix is different (вызови, назови, позови, призови, созови). However, the first verb has the stress differing from others. May be it's an exception...I'm not strong in the theory Let's wait for another reply

Hey, it is not a mathematics, it is a natural language. Rule #1: there are always exceptions from any rule and from any exception as well. Once at school I tried to learn all that theoretical staff about conjugations an found that it is too contradictory and there are too many exceptions to take those rules seriously.

Let's see...

звать - зови
брать - бери
драть - дери {a vowel is added to the root}
спать - спи
бдеть - бди {no vowel added}
скакать - скачи
бежать - беги
чесать - чеши {last consonant is changed.}
жать - жми {err... Something is changed.}

Let's see the verbs ended by -сть/ -сти:
класть - клади
вести - веди
пасти - паси
расти - расти
...