Defining Relative Clauses: Who, Which, That, Where

• We use relative clauses to give essential information about a person, a thing, or a place. These clauses help us connect two simple thoughts into one natural sentence.
• Relative Pronoun
• Used for...
• Example
• who / that
• people
• Molly is the developer who writes the code.
• which / that
• things and software
• Git is a tool which helps us manage code.
• where
• places
• The cloud is a place where we store data.
• Remember
• Use 'who' or 'that' when you talk about developers, managers, or other people.
• Use 'which' or 'that' when you talk about laptops, programs, databases, or tools.
• Use 'where' when you talk about offices, rooms, servers, or web locations.
• Do not use 'who' for inanimate things, and do not use 'which' for people.
• Examples
• Tyler is the engineer who configures our new servers.
• This is the database that contains all customer records.
• We work in a cozy room where we have three big monitors.
• Common mistakes
• This is the developer which fixes the bugs.
• This is the developer who fixes the bugs.
• I like the tool where helps me write code.
• I like the tool which helps me write code.

Complete the sentences

• I need a code editor (thing) ____ has a dark theme.
• Do you know the DevOps engineer (person) ____ configures our servers?
• The office is a place (location) ____ we collaborate with our team.
• Python is a programming language (thing) ____ is easy to learn.
• This is the server room (location) ____ we keep our physical hardware.
• She is the project manager (person) ____ schedules all our daily meetings.

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