I came across this sentence recently:
Dün bütün gün matematik çalışıyordum

In this sentence the verb "çalışmak" seems to have the suffixes for both present continuous and past tenses :-S Is this a sixth tense or a mix of tenses or something else???

Hi bod,
you got it right. It is a mixture of tenses. To call it a new tense or just a mood of tense doesnt make a difference. In Turkish we call them moodes of tenses. Some tenses have these moods. I will soon give a further explanation with examples.

By the way, your example is incorrect. It should be,

"Dün bütün gün matematik çalıştım."

We can use that tense in such a sentense:

Dün beni aradığında matematik çalışıyordum.
Yesterday when you called me, I was studying maths.

This site says there are 5 fundemental tenses in Türkçe - but implies there are actually more.......

1. Present simple tense (Geniş zaman)
2. Present continuous tense (Şimdiki zaman)
3. Future tense (Gelecek zaman)
4. Past tense with -di (-di'li geçmiş zaman) --> Regular past tense
5. Past tense with -miş (-miş'li geçmiş zaman) --> Also called the story past tense

Are there actually more?????

If we mix present continuous and past (past continuous???) is that actually another tense or is it a 'mood'? I don't understand what you mean by moods although I have seen the term before.

Hi bod,
in short
1. we have the five tenses you mentioned.
2. In addition to these the compound tenses are made either with -di (past tense) or -miş (reported/inferential past tense).
3. In addition we have Obtative Tense/Mood, Necessitative Tense/Mood, Subjunctive Tense/Mood, Conditional Tense/Mood. To see these last three as tenses or moods doesnt make a difference. Bilkent university shows them as tenses (see below link) while others follow the traditional way and show them as verb moods.

On this page double click on items you want to check.
http://www.cs.bilkent.edu.tr/~guvenir/CATT/GrammarTutor/

winmekmak has actually everything you need.


mood: Grammar. A set of verb forms or inflections used to indicate the speaker's attitude toward the factuality or likelihood of the action or condition expressed. In English the indicative mood is used to make factual statements, the subjunctive mood to indicate doubt or unlikelihood, and the imperative mood to express a command.
souce: answers.com

Answers.com has a nice alt+left click feature that works everywhere.