What tenses should I use after these adverbs, Present Simple or Present Perfect? Is it possible to use the Future Simple?
Present perfect conveys a sense of the end of the action, whereas present simple conveys a sense of the beginning or middle. For example,
As soon as I have eaten, I will help you with that. As soon as I eat, my stomach starts grumbling.
The first sentence refers to once the eating is done, but the second sentence refers to when the eating starts. Simple future is never used here.
Source : Link , Question Author : Artem Merkotun , Answer Author : Jakob Weisblat