Question 1

When do I use "whose" in a sentence?

Accepted Answer

Use "whose" when you want to show that something belongs to the person or thing you are describing. It replaces possessive words like "his," "her," "their," or "its." For example: "I know a woman. Her son is a doctor" becomes "I know a woman whose son is a doctor." "Whose" works for people and things: "The house whose roof is broken needs repairs." A common mistake is writing "who's" (short for "who is") instead of "whose" (possession). "The girl who's bag was stolen" is wrong — it should be "The girl whose bag was stolen."

Question 2

Can I use "that" instead of "where" or "when"?

Accepted Answer

In many cases, yes. For times, "that" and "when" are usually the same: "The day when we met" = "The day that we met." You can even leave both out: "The day we met" is also correct. For places, "that" can sometimes replace "where," but it sounds less natural: "The restaurant that I ate at" vs "The restaurant where I ate." When using "that" for places, you usually need a preposition at the end ("at," "in," "to"). With "where," no preposition is needed. For formal English, "where" and "when" are clearer choices.

Question 3

How do I use "when" in a relative clause?

Accepted Answer

Use "when" after a time word — for example, "day," "year," "moment," "time," "summer," or "period." "When" replaces time phrases like "on that day" or "at that time." For example: "I remember the day. We met on that day" becomes "I remember the day when we met." You do not need a preposition after "when" — "the day when on we met" is wrong. In everyday English, you can often drop "when" completely: "I remember the day we met" is natural and correct. "When" is also useful in formal writing to make the time reference very clear.

That, Whose, Where, When Exercises

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Relative Clauses Error Correction

Who vs Which

Defining vs Non-Defining

-ed vs -ing Adjectives

Conditionals

Present Perfect