Explanations:Zero conditional sentences are used to express general truths, scientific facts, or habitual actions. They are formed using the present simple tense in both the if-clause and the main clause. The structure of a zero conditional sentence is as follows:
Zero Conditional Structure:
If/When + present simple, present simple
For example:
If you heat water to 100 degrees Celsius, it boils.
When the sun sets, it gets dark.
These sentences describe situations that are always true or habitual actions that occur regularly. The use of the present simple tense in both clauses indicates that the condition and the result are both in the present and are universally true or habitual.
Let's analyze the given options in the context of zero conditional:
Option A: "They will travel to Europe if you help them."
This sentence is incorrect because it describes a future action (will travel) based on a present condition (if you help them). This is a first conditional sentence, which is used to describe future possibilities that are likely to happen if a certain condition is met. The structure of a first conditional sentence is:
If + present simple, will + base form of the verb
Option B: "If Adrian is cheating, he will be in problems."
This sentence is also incorrect because it describes a future consequence (will be in problems) based on a present condition (if Adrian is cheating). This is another example of a first conditional sentence, which is used to describe future possibilities that are likely to happen if a certain condition is met.
Option C: "If Fabiola talks with him, he doesn't go away."
This sentence is correct because it describes a habitual action (he doesn't go away) based on a present condition (if Fabiola talks with him). Both clauses use the present simple tense, which is characteristic of zero conditional sentences. This sentence indicates a habitual or regular occurrence that happens every time the condition is met.
Option D: "The water will be cleaner if we take care of it."
This sentence is incorrect because it describes a future consequence (will be cleaner) based on a present condition (if we take care of it). This is a first conditional sentence, which is used to describe future possibilities that are likely to happen if a certain condition is met.
In summary, zero conditional sentences are used to express general truths, scientific facts, or habitual actions. They use the present simple tense in both the if-clause and the main clause. The correct example in the given options is Option C, which describes a habitual action that occurs regularly when the condition is met.