Circle the correct one to form the first conditional sentences. 1If you join our sailing club, you will get / have a really good time. 2 She will not have time to have fun if she studies / studies too hard. 3 If you arrive / are late, the lecturer will not let you in. 4 I will help / assist you with your application if you want me to do so. 5 If she goes to summer school in London, she will improve her English. 6 He will learn / learn to ski if he goes to university in Canada.

1. If you join our sailing club, you will have a really good time.
In this sentence, the correct option is "have" because it is used to talk about experiencing or enjoying something in the future. "Will get" would imply that the person will receive something, which doesn't fit in the context of the sentence.

2. She will not have time to have fun if she studies too hard.
The correct option here is "studies" because the first conditional is used to talk about possible future actions or outcomes. In this case, if she studies too hard, it implies that she will not have time to have fun. Going with "studies" maintains the logical connection between the two parts of the conditional sentence.

3. If you are late, the lecturer will not let you in.
Here, the correct option is "are" as it refers to a specific point in time when someone is late. Using "arrive" would imply the action of arriving, which doesn't convey the same meaning as being late.

4. I will help you with your application if you want me to do so.
In this sentence, both "help" and "assist" can be used interchangeably. However, "help" is a more commonly used and simpler word, making it easier for a student to understand.

5. If she goes to summer school in London, she will improve her English.
The correct option here is "goes" because it denotes a future possibility. "Will go" would imply a definite future action, but in this case, we are talking about a conditional situation.

6. He will learn to ski if he goes to university in Canada.
In this sentence, the correct option is "learns" as it is used to indicate a future possibility or outcome. "Will learn" would imply a definite future action, which doesn't align with the condition in the sentence.

By explaining the reasoning behind each choice and providing step-by-step explanations, the student can understand the correct selection and the grammar rules behind it.