You should add -yor to the verb in order to construct a sentence in continuous tense: Oku- Oku-yor-um Oku-yor-sun Oku-yor Oku-yor-uz Oku-yor-sunuz Oku-yor-lar A short note about -yor suffix in Turkish: With the verbs ending in a consonant, add -iyor instead of -yor. Gel- (Ending in a consonant) Gel-i-yor-um Gel-i-yor-sun Gel-i-yor Gel-i-yor-uz Gel-i-yor-sunuz Gel-i-yor-lar -r is used with simple present tense: Oku-r-um Oku-r-sun Oku-r Oku-r-uz Oku-r-sunuz Oku-r-lar

Okurum = simple present tense ( in general) Okuyorum = simple continuous tense. (right now)

If you're reading a book right now you need to say : Ben bir kitap okuyorum.