Weak tenses are a group of tenses and aspects in the lines of the Strong tenses, but with the difference that the root is not modified and a prefix is used which is k(V)- being (V) = any vowel. So we have in this category the Habitual aspect, the Perfective aspect, the Future tense and the Conditional. The Habitual takes the prefix ki- and denotes an action that continues through time, a habit or an ongoing action.
Kilev kwam. I see (everyday), I am seeing, I am used to seeing.
Kitulv kwam. I think (everyday), I am thinking, I am used to thinking.
Këvud kwam. I know (everyday), I am knowing, I am used to knowing.
Kithark kwam. I use (everyday), I am using, I am used to using.
Kiprum kwam. I speak (everyday), I am speaking, I am used to speaking.
These can be further developed into the past tense habitual, so:
Kiluev kwam. I used to see, I was seeing.
Kitaulv kwam. I used to think, I was thiking.
Këvaud kwam. I used to know, I was knowing.
Kithuark kwam. I used to use, I was using.
Kipraum kwam. I used to speak, I was speaking.
Then we have the Perfective aspect, which indicates an action that has been completed or done already. The prefix is ka- so:
Kalev kwam. I have seen.
Katulv kwam. I have thought.
Kaëvud kwam. I have known.
Kathark kwam. I have used.
Kaprum kwam. I have spoken.
Then the Future tense, which uses the prefix ku-, so:
Kulev kwam. I will see.
Kutulv kwam. I will think.
Kuëvud kwam. I will know.
Kuthark kwam. I will use.
Kuprum kwam. I will speak.
Finally, in the Weak Tenses, we have the Conditional, which takes the prefix kya-, so:
Kyalev kwam. I would see.
Kyatulv kwam. I would think.
Kyaëvud kwam. I would know.
Kyathark kwam. I would use.
Kyaprum kwam. I would speak.
The conditional construction needs a special post in Tulvan, which will come very soon.