What you'll learn
By the end of this lesson, you'll be able to use noun clauses as subjects and objects for sophisticated, natural English.
When do I use it?
A noun clause works like a noun — it can be the subject or object of a sentence:
- Subject: "What you said surprised me." "That she won is no surprise."
- Object: "I don't know where he went." "She asked whether we agreed."
- After prepositions: "We talked about what to do next."
Introducers: that, what, whatever, who, whoever, whether, if, why, when, where, how.
How do I form it?
what/that/whether + clause (as subject or object)
- What I need most is time.
- I wonder whether they will come.
- Whoever arrives first can start.
- The fact that she left early worried us.
- We discussed how to solve it.
Common mistakes for Spanish speakers
Spanish uses "lo que", "que" naturally, but speakers often add a double subject: "what you said it surprised me" — drop the "it". Also, a that-clause as subject needs the noun "the fact": "the fact that she left" (plain "that she left worried us" is fine in speech but "the fact that" is safer). And a noun clause cannot use question word order inside: "I don't know where did he go" is wrong — "where he went".
What + clause = subject/object. No double subject ("what you said it"). No inversion inside ("where he went").
Practice
Multiple Choice
C1Which sentence is correct?
Fill in the Blank
C1I don't know he went last night.
Hint: A noun clause keeps statement word order.
Find the Error
C1Sentence Transformation
C1Task: Rewrite with 'The fact that...'
Hint: the fact + that + clause.
Practice Speaking
Apply what you've learned in a real conversation with AI feedback.
Level: C1