Formal:
* 正在去 (zhèng zài qù) - This is the most common and literal translation, meaning "in the process of going."
* 要去 (yào qù) - This means "going to go," implying a future intention.
Informal:
* 去 (qù) - This is a short and informal way to say "going."
* 正去 (zhèng qù) - This is a slightly more formal way than just "qù" but still informal.
Example:
* 你正在去哪里? (Nǐ zhèng zài qù nǎlǐ?) - Where are you going?
* 我要去商店。(Wǒ yào qù shāngdiàn.) - I am going to the store.
* 我要去吃饭了 (Wǒ yào qù chīfàn le.) - I am going to eat.
* 我正在去朋友家。(Wǒ zhèng zài qù péngyou jiā.) - I am going to my friend's house.
The specific choice of phrase depends on the specific context and level of formality.