Ability, construction -A BIL-

One of the construction for acquired ability, "verb-A BIL-", is formed with the present gerund of the verb followed by the auxiliary verb bil- (root meaning: 'to know'), which can in turn be conjugated like any verb for tense/aspect meanings.
The present gerund is itself formed by adding to the verb stem the suffix -A (verb stems ending in a consonant) or -Y (verb stems ending in a vowel)

With the verb yozmoq, 'to write', ending with a consonant, and in the present-future:

yoza bilamanI know how to write
yoza bilasanYou know how to write
yoza biladiHe/she/it knows how to write
yoza bilamizWe know how to write
yoza bilasizYou know how to write
yoza biladilar / biladiThey know how to write

With the verb o'qimoq, 'to read', ending with a vowel, and in the present-future:

o'qiy bilamanI know how to read
o'qiy bilasanYou know how to read
o'qiy biladiHe/she/it knows how to read
o'qiy bilamizWe know how to read
o'qiy bilasizYou know how to read
o'qiy biladilar / biladiThey know how to read

The negative is formed by adding the negative suffix -MA to the auxiliary verb bil-.

yoza bilmaymanI don't know how to write
yoza bilmaysanYou don't know how to write
yoza bilmaydiHe/she/it doesn't know how to write
yoza bilmaymizWe don't know how to write
yoza bilmaysizYou don't know how to write
yoza bilmaydilar / bilmaydiThey don't know how to write