я (!) не стал - I (did) not become;
ты (!) не стал - you (did) not become;
он (!) не стал - he (did) not become;
она (!) не стала - she (did) not become;
оно (!) не стало - it (did) not become;
мы (!) не стали - we (did) not become;
вы (!) не стали - you (did) not become;
они (!) не стали - they (did) not become;