In the case that there is no overt marker, we can try inserting some of those markers to verify its finiteness.
in a similar way, we can test whether the verb is non-finite by inserting infinitival markers จะ'irrealis marker', ที ่ จะ-'that+irrealis marker' and ที ่ ว่ ำ-'that+say' since a non-finite clause is usually introduced by these markers testing finiteness of verb by inserting tense, aspect, mood markers, and infinitival markers requires Thai native speaker to judge whether the sentence is valid or not.