Hello!

I have a problem regarding the use of a verb with "should" interfix -meli- as the participle. For example when I wanna say He said he loves me - O beni sevdiğini söyledi. - I use the participle (-dik) form of the verb and everything´s OK. But how to build such a contruction with should? The form with -meli- eg. yapmalısın (you should do) isn´t an usual tense form because of lacking any tense suffix (-iyor, -di), so I wonder if I am allowed to turn it into a participle... How do I say I think you should do it ? Will Bunu yapmalıdığını düşünüyorum be all right? My another guess is Bunu yapmalı olduğunu düşünüyorum because I noticed that the "should" forms behave like adjective + "to be" constructions (the same suffixes). Is any of my suspictions good, or I must use any other construction?

You forgot the accusative ending from your example, sufler:

         O beni sevdiğini söyledi.

         sev|diğ|i|n|i = verb stem + dik + poss sg 3rd + pronominal -n- + acc ending.

You can´t make -meli- form into a participle because it is not a verb but rather an adjective. To express necessity, add the verb gerekmek.

         Bunu yapman gerektiğini düşünüyorum.

         yap|ma|n = verb stem + infinitive marking + poss sg 2nd

gerektiğ|i|n|i is analysed the same way as sevdiğini above. It is also sg 3rd because gerekmek is a monopersonal verb.

This was My Try, wait for corrections.