Learn Turkish: Hapşırıyorsun, bugün evde dinlenmelisin. - You are sneezing, you should rest at home today.

It starts with the verb root dinlen- (to rest). Then we add the obligation suffix -meli (should/must). Finally, we add the personal ending for "you", which is -sin. We use -meli instead of -malı because of the e-type (front) vowels in dinlen.

I always mix up "dinlemek" and "dinlenmek". Would "dinlemelisin" make sense here?

They are very easy to confuse! Dinlemek means "to listen," while dinlenmek means "to rest." If you said dinlemelisin, it would mean "you should listen," which doesn't fit the context of sneezing. Remember that extra n for resting!

Does the "-meli" suffix mean "should" or "must"?

It actually means both! Turkish doesn't have separate suffixes for strong advice ("should") and strict obligation ("must"). You have to rely on context. Here, advising a sick person to stay home naturally translates to "you should rest."

Let's review "hapşırıyorsun". Why is there an "ı" before the "-yor"?

The verb root is hapşır- (sneeze). When attaching the present continuous suffix -yor, a connecting vowel is needed. Following 4-way vowel harmony rules, the ı in the root dictates that the connecting vowel must also be ı, resulting in hapşırıyorsun.