You should know the effective language to talk about the probability of something or the timescales in which things happen. It is easy to include some of the qualifiers in your ideas, to show that you have thought about the probability and/or timescales of the events. Some of the straight forward ways are;-
|ultimately (= eventually, finally) rapidly soon potentially long term immediate||X may possibly happen||X will gradually/steadily happen||X will suddenly happen|
|X will inevitably happen (= it cannot be prevented)||X will undoubtedly happen||X will happen step by step||X will spontaneously happen (= without outside help)|
In your essays and speaking, try to include some of these qualifiers; this is a way to improve the examiner’s perception of your language skills.