Which sentence uses 'come across' correctly?

I came across an old photo while cleaning the attic

I came across the street to meet you

I came across an old photo while cleaning the attic

The bridge came across the river

Which sentence uses 'come across' correctly?

She comes across as very confident in interviews

He came across the finish line first

Which sentence uses 'come by' correctly?

Good jobs are hard to come by these days

The bus will come by this route

Good jobs are hard to come by these days

I come by the office every morning at 8

Which sentence uses 'come by' correctly?

Can you come by my house later for coffee?

The train came by the station too fast

She comes by the grocery store home

Which sentence uses 'come out' correctly?

The new iPhone will come out next month

I need to come out from the house now

The new iPhone will come out next month

Which sentence uses 'come out' correctly?

The truth finally came out after the investigation

The students came out to the classroom

Understanding the Phrasal Verb 'Switch On'

"In the journey of enlightenment, you must first switch on the light of awareness to illuminate paths hidden by ignorance."

📖 Definition

The phrasal verb 'switch on' means to activate or turn on a device or process by operating a mechanism such as a switch or button.

Examples in context

Every morning, she makes sure to switch on the kettle for her tea.
To start the meeting, first switch on the projector and the computer.
During the storm, we had to switch on the backup generator.

📖 Definition

The phrasal verb 'switch on' means to activate or turn on a device or process by operating a mechanism such as a switch or button.

📝 Grammar Info

Separable

Yes

'Switch on' can be split by a noun (e.g., 'Switch the light on').

Neutral

Used in both formal and informal contexts.

Transitive

Yes

Requires a direct object (e.g., 'He switched on the TV').

📊 Conjugation Table

Tense	Form	Example
Present Simple	switch on	She switches on the lamp every evening.
Past Simple	switched on	He switched on the computer before work yesterday.
Present Continuous	switching on	I am switching on the projector for the meeting.
Present Perfect	have switched on	They have switched on all the lights in the house.

💡 When to Use

Activating devices

Use when you are turning on electronic devices or systems, like lights or computers.

Example: "I need to switch on the fan; it's very hot."

Initiating processes

Employ when starting or energizing a process or operation, like starting a discussion or engine.

Example: "Let's switch on the brainstorming session with some warm-up exercises."

In formal instructions

Use in manuals or directives to describe the action of turning on equipment.

Example: "Switch on the device and hold for three seconds to start the calibration process."

⚠️ Common Mistakes

Misplacing object

❌ Wrong: He switch on the radio.

✅ Correct: He switched on the radio.

💡 Tip: Remember to use the correct past tense form: 'switched'.

Inseparable usage

❌ Wrong: He switched the TV on easily.

✅ Correct: He switched on the TV easily.

💡 Tip: 'Switch on' can separate, but placing the object at the end is common.

Using with intransitive meaning

❌ Wrong: Switch on quickly now.

✅ Correct: Switch on the lights quickly now.

💡 Tip: Always switch on something; must have an object.

Practice

SWITCH ON - IN PRACTICE

Study Method Proposal

Listen and repeat the audio as many times as needed to improve your pronunciation
Use the audio as a dictation exercise, trying to write what you hear and understand
Create a new sentence following the structure of the example sentences

Examples in Context

1
Listen to example

Every morning, she makes sure to switch on the kettle for her tea.
Computers The Digital Leap
2
Listen to example

To start the meeting, first switch on the projector and the computer.
Computers The Digital Leap
3
Listen to example

During the storm, we had to switch on the backup generator.
Computers The Digital Leap

Synonyms & Antonyms

Synonyms

activate turn on

Antonyms

switch off

Quick Check

Complete the sentence with the correct phrasal verb:

"To start the presentation, please ___ the projector."

switch off

switch on

shut down

turn off

❓ Frequently Asked Questions about Switch On

What is the origin of switch on?

The phrase 'switch on' originates from the electrical switch technology invented in the 19th century, allowing users to turn mechanical devices on or off. Over time, it became widely used in English to denote activating electronic devices or processes.

Can switch on be used in formal and informal contexts?

Yes, 'switch on' can be used in both contexts. In formal settings, it's applied in manuals or official instructions, while in informal contexts, it describes everyday actions like turning on lights or appliances.

What is the difference between switch on and activate?

'Switch on' is often used for physical actions like turning on a device, whereas 'activate' is broader, encompassing starting operations, initiating features, or enabling systems, often implying a broader scope beyond mere physical action.

Browse All Computers The Digital Leap Phrasal Verbs

About the Author

Alessandra Nóbrega

History teacher who fell in love with English! This passion led me to specialize in languages and work on bilingual education projects. With 37 years in education, I believe learning should be meaningful – not just memorization.

Learn more about my journey

📖 Definition

📖 Definition

📝 Grammar Info

📊 Conjugation Table

💡 When to Use

⚠️ Common Mistakes

SWITCH ON - IN PRACTICE

Study Method Proposal

Examples in Context

Synonyms & Antonyms

Quick Check

❓ Frequently Asked Questions about Switch On

Related Phrasal Verbs

Alessandra Nóbrega