Beware of the Context:  Taishanese, like Cantonese and Mandarin, does not inflect verbs to indicate Tense or Person. Thus a simple sentence like '我买鸡' can be translated to 'I bought chicken', 'I buy chicken', or ''I will buy chicken' depend on the context. Time adverbial clause could be added for clarity, for example, 天早买鸡 (I will buy chicken tomorrow). Similarly, nouns do not carry plurality information:

铅笔. I have pencils (the number is not important. The emphasis is on have).
一支 铅笔 I have one pencil. I have a pencil.
铅笔 I have a pencil.

The word to indicate Possession is . It's negation is . The word is also used to indicate at or in that place: the equivalent of 'there is' or 'there are.'

铅笔. I have pencils.
铅笔. I do not have any pencils.
学校 有 班房 There are classrooms in school.
学校 班房 There's no classroom in school.

Unit Words. Chinese nouns typically require classifiers, or unit words to define quantity. You've learned quite a few of them, i.e. the in 我有一支铅笔(I have a pencil). Here is a summary:

  Examples from the Lessons More Examples
(book), 字典(dictionary) car, printer, computer
(book), 草稿簿(scratch pack), 字典(dictionary)  
(pen), 铅笔(pencil), 粉笔(chalk) arrow, gun, pole, flash light
学校(school), 班房(classroom), 屋(house,home) factory, hospital, room
学生(student) people, hamberger, hour, ball, apple
报纸(newspaper), 枱(desk, table), 櫈(chair) bedspread, paper, bed

Volume I:     Grammar 1