IELTS Common Mistakes - If / When / Whether

Explanation
The correct answer is "whether". In this context, "whether" is used to introduce a clause indicating a choice between two possibilities. It suggests that the speaker is recommending to check if the person has a permit or not, implying that there is a doubt or uncertainty about the situation. "If" and "when" do not convey the same meaning in this sentence.

Explanation
The correct answer is "when". The word "when" is used to indicate a specific time or event in the future. In this sentence, it suggests that the action of moving to a smaller house will occur at the time or event when the children leave home.

Explanation
The correct answer is "when." This is because the sentence is suggesting that the person should come in the summer because the weather is better during that time. "When" is used to refer to a specific time or period, which fits the context of the sentence. "If" and "whether" are not suitable in this case as they do not convey the idea of a specific time.

Explanation
The word "whether" is the correct answer because it is used to introduce a choice between two or more possibilities. In this context, the sentence is discussing the doubts or questioning surrounding the usefulness of the project, indicating that there is a choice or uncertainty between whether the project is useful or just a waste of money.

Explanation
The correct answer is "if". This is because the sentence is expressing a hypothetical situation where it would be helpful to have a breakdown of the scores. "If" is used to introduce a condition or possibility.

Explanation
The word "whether" is used to introduce a clause indicating a choice between two or more alternatives. In this context, the tests were conducted to determine if the person had the disease or not. The word "whether" is commonly used in such situations to express uncertainty or doubt about the outcome.

Explanation
The correct answer is "if" because it is used to express a condition or possibility. In this sentence, it suggests that the speaker is unsure if the person being addressed would be able to come, and if they were able to come, it would please them.

Explanation
The correct answer is "when". This is because "when" is used to indicate a specific point in time or a condition that must be met before an action can take place. In this case, the action of collecting the rental car can only happen after showing your driving licence.