As if / As though
We use as if and as though to describe how something seems, feels or appears. They introduce a comparison: the situation may be real, unreal or imagined.
1. Same meaning, slightly different preference
As if and as though have the same meaning. As if is more commonly used.
You look as if you’re really stressed.
2. Choose the tense by meaning
The key question is: do we think the comparison is real/probable, or unreal/unlikely?
She looks as if she is exhausted.
She probably is exhausted.
He acts as if he were the boss.
He isn’t the boss.
He looked as if he had seen a ghost.
He hadn’t seen a ghost.
Photos: tired person · confident man · surprised man (Unsplash)
3. The three patterns, side by side
| Pattern | Meaning | Example |
|---|---|---|
| as if + present simple | Real or probable | He talks as if he knows the answer. |
| as if + past simple | Unreal or improbable now | He talks as if he knew everything. |
| as if + past perfect | Comparison with an earlier past | He looked as if he had seen a ghost. |
4. Was or were?
For unreal or improbable situations, we can use was or were with I / he / she / it. Were is more common in written English.
5. Other useful structures
Tom moved his lips slightly as if to smile.
I screamed as if in pain.
You look like you’ve been swimming. (Especially common in informal British English.)
Choose the correct option
Choose the form that best matches the meaning of each sentence.
Complete the sentences
Use the words in brackets. Change the verb form where necessary.
Tip: punctuation and contractions may vary. Focus on the tense and the structure.
Rewrite the sentences
Complete the second sentence so that it means the same as the first. Use as if or as though.
It looked outside, but it wasn’t.
He looked at me for the first time.
She looks about the exam.
They talked on the subject.
It felt this film before.
What’s the reality?
Read the situation, then choose the sentence that best describes it. You’ll need to notice whether the comparison is real, unreal or about an earlier past.

Alex answers every question confidently. He really does know the topic very well.
Mini challenge
Complete each prompt with your own idea. Then compare it with the model answer. There may be more than one correct answer.
Quick self-check
- Did I choose the tense according to the meaning?
- Did I use the past simple for an unreal present comparison?
- Did I use the past perfect for an earlier past comparison?
- Did I include as if or as though correctly?