When you are speaking, it doesn't matter which one you use, but in order to understand what others are saying, it's good to remember these three variations.
Verb + ing
* 1 2 3 All three example sentences mean [I am eating a meal]
1.[กำลัง] + verb + [อยู่]
กำลังกินข้าวอยู่
2.[กำลัง] + verb
กำลังกินเข้า
3.verb + [อยู่]
กินข้าวอยู่
Now~going to do~
*Here the present progressive tense [กำลัง] and future tense [จะ] are used together
[กำลัง] + [จะ] + verb (+object)
Now I am going to go eat.
กำลังจะไปกินข้าว
