Final answer:
The correct answer to the question is option (a): 'Kate always wears this coat when it rains,' as it describes a habitual action using the present simple tense indicating a routine whenever it rains.
Step-by-step explanation:
The correct answer to the statement "Kate always ___ this coat when it ___." is: Kate always wears this coat when it rains. The sentence should be completed with option (a) wears, rains. This is because the sentence describes a habitual action in the present simple tense, indicating something that Kate regularly does whenever it rains. In English grammar, the present simple tense is used to describe routines, facts, or general truths.
Choosing the present simple tense 'wears' to fit the first blank is appropriate because it reflects a recurring action or habit of Kate. Similarly, the present simple 'rains' correctly fills the second blank as it refers to a general condition or fact about the weather. When combining both, we explain a situation that whenever the condition (it rains) occurs, the action (Kate wears the coat) happens.
In the typical patterning of English usage, the first part of the sentence sets up a condition, and the second part reveals an action that takes place under that condition. It's similar to the pattern demonstrated in conditional statements, for example: "If you walk in the rain, your shirt will get wet." Despite this, the correct form for the sentence in question is the present simple and not future or conditional forms.