Like vs. As
“Like” and “as” have several uses, but a practical core distinction is that “like + noun phrase” expresses similarity, while “as + noun phrase” expresses a role or function. “As” also works as a conjunction in other structures.
Use “like” for similarity and “as” for a role or function in the core noun-phrase contrast: “like a teacher” versus “as a teacher.”
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| similarity/comparison before a noun phrase | like | Use “like” for resemblance. |
| role, capacity, or function | as | Use “as” when something actually serves that role/function. |
Quick tests
Meaning / construction test
Do you mean that something resembles the noun rather than actually having that role?
If yes: Use “like.”
If no: Use “as” for the actual role or function.
Examples
She works as a consultant.
“As” identifies her actual role.
The software works like a calculator.
“Like” expresses similarity.
He spoke as the team representative.
“As” marks the capacity in which he spoke.
Further guidance
Role Boundary
Use as + noun phrase for role or function: “works as a consultant.”
Similarity Boundary
Use like + noun phrase for similarity: “works like a charm.”
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Word choice: as or like? — English Grammar Today (opens in a new tab)Cambridge Dictionary · Like for similarity and as for role/function in the relevant noun-phrase patterns