The suffixes for words in the accusative case are -i4 (for words ending in a consonant) and -ni4 (for words ending in a vowel). See the post on vowel harmony for an explanation of these "to the power of 4" abbreviations.
Some examples of sentences with verbs that take the accusative:
Mən o kişini tanıyıram. I know (am acquainted with) that man.
Mən kişiləri görürəm. I see the men.
but - Mən çoxlu kişi gördüm. I saw some men. If the object is indefinite, use the nominative case.
Mən kitabı oxuyuram. I am reading the book.
but - Mən kitab oxuyuram. I am reading a book. I read books.