Get sick
The phrase "krank werden" is the German equivalent of "get sick". It is used to express the process of becoming ill or unwell. The word "krank" means "sick" and "werden" is a form of the verb "to become". This phrase can be used in a variety of contexts, such as "Ich bin krank geworden" (I got sick), or "Er wird krank" (He is getting sick).
I can get sick if I do that.
This sentence denotes a conditional possibility where the speaker may get sick as a consequence of doing something specific. The speaker is predicting a potential negative outcome if he/she performs a certain action.
If you don't pay attention, you will get sick.
In this example, the speaker is issuing a warning where the conditional 'if' sets the circumstance under which the predicted outcome will happen. The speaker expects that without caution, the listener is likely to fall sick.
Unhealthy food can make you sick.
This sentence connects 'unhealthy food' and 'getting sick' to imply a causal relationship. The speaker warns that consuming unhealthy food has the potential to lead to sickness.