Questions & Answers about Ég geri ekki allt í einu.
Because geri is the 1st person singular present tense form of the verb að gera (to do / to make).
So:
- ég geri = I do
- þú gerir = you do
- hann/hún/það gerir = he/she/it does
- við gerum = we do
- þið gerið = you (plural) do
- þeir/þær/þau gera = they do
This is a very common verb, and it changes stem in the singular forms, so you cannot just use the infinitive gera after ég.
In a normal main clause, ekki usually comes after the finite verb.
So:
- Ég geri ekki ... = I do not do ...
This is the standard position for sentence negation in Icelandic.
Compare:
- Ég kem ekki. = I am not coming.
- Hún veit ekki. = She does not know.
So Ég ekki geri... would be wrong in ordinary neutral word order.