The interrogative conjugation by this phrase simply consists in the regular conjugation of the verb, placing before every inflection the said phrase followed by the particle ng̃a. As
| ¿cay anó ng̃a nasurat ca? | (why do you write?) |
| ¿cay anó ng̃a sinmurát hiya? | (why did he or she write?) |
| ¿cay anó ng̃a macadto quita? | (what shall we go there for?) etc. |
Diin, hain.
The interrogative primitive formed; by these adverbs, has only two inflections: one which consists in the original root, and which is the past tense indicative; and the other which consists on the same root, its first syllable being doubled; this last form is for the present and future tenses, indicative. These three tenses are the only tenses that this conjugation has. The adverb “diín” is for the present and past tenses. The adverb “háin” is for the future. Thus:
| Present: | ¿diin acó susurat? | (where do I write?) |
| Past: | ¿diin ca surát? | (where did you write?) |
| Future: | ¿háin camí susurát? | (where shall we write?) |
The interrogative progressive only differs from the preceding one in that the particle pag precedes all of the inflections. In plural this pag becomes pa, pan, or pang, according to the same rules laid on the progressive active form.[90] Thus:
| ¿diín ca pagsusurát? | (where are you writing?) |
| ¿háin camó panunurát? | (where will you be writing?) |
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In passive voices, these same forms are followed except in that the root takes the affix a in the direct passive and the affix i in the indirect passive, and the prefix i for the primitive form, or the prefix ig for the progressive form, in the instrumental passive. Thus:
| ¿diín suratá? |
| ¿diín suratí?, etc. |