いく つもり は ない
I have no intention of going

There are two negative forms:
The first negative form has a strong meaning - "I have no intention of ..."
  • Form: plain form verb + つもり　は　ない・ありません
ジェットコースター  に  のる　つもり　は　ありません。
  • I have no intention of riding ​on the roller coaster.
その　つもり　は　なかった　です。
  • That was not my intention.
We can also put the verb in the plain form negative, and add つもり　です・でした.
​This negative form is often used in the past tense, with an implied "but". (e.g. I didn't intend to do it, but..."
だれにも  いわない　つもり　だった　のに、いって　しまいました。
  • Even though I intended not to tell ​anybody, I ended up telling.
Let's review what we learnt in Year 11. 
Add つもり です after a verb in the plain form. 
ぎょうざ  を  たべる　つもり　です。
  • I intend to eat gyouza.
  • (To eat gyouza is the intention.)
タクシーで　行く　つもり　です。 
  • I intend to go by taxi.
  • (To go by taxi is the intention.)
ゲームソフト  を  かう　つもり　です。
  • I intend to buy video games.
  • (To buy video games is the intention.)
When we put this into the past tense, there's an implied "but". (e.g. "I intended to exercise, but...")
やさい  を  たべる　つまり　でした　けど、ポテトチップスを　たべて　しまいました。
  • I intended to eat vegetables but I ended up eating potato chips.
  • (To eat vegetables was the intention, but...)