A Grammar of Turkish Sign Language (TİD)

Sentence adverbials modify the entire proposition, not just the verb. They may express modality or temporality.

Some of the sentence adverbials are modal adverbials since they contribute deontic or epistemic modal meaning. For example, the adverbial probably in the examples below conveys the attitude of the signer towards the content of the sentence and it expresses epistemic modality.

         not sure ix₁. ix_a dress like. probably buy. 
  'I am not sure. I like that dress. I will probably buy it.'

probably asli come not.

'Aslı will probably not come.'

Temporal adverbials are a sub-category of sentence adverbials. Common temporal adverbs are yesterday, today, and soon. The tense marker in_the_past [Lexicon 3.3.1] can also be considered a temporal adverbial.  These point to the back, front or other sides of the signer depending on the time reference as can be seen in the examples below:

  yesterday                                         tomorrow

today                                                  later                                                                                    

now                                                ın_the_past