# For or On

When we are talking about certain times, which preposition of time can we use? In this lesson, we will learn when to use 'for' and 'on.'

## Which One Should Be Used?

'On' and 'for' both can be used to show time as they are prepositions of time.

## Indicating The Amount of Time

'For' is used to show the amount of time an action took. For a example:

I waited for hours but she didn't show up.

He hasn't called us for years.

## Indicating The Time of Occurrence

We can use 'on' to show when an action or event happened. Have a look:

My birthday is on 11th of April.

She had several traumas on arrival at the hospital.

## Are They Interchangeable?

The answer is no. We cannot replace 'for' and 'on' as the meaning will change completely and it will confuse the audience.

## For and On in a Sentence

We can use 'for' and 'on' in one sentence to give more detail about the time.

I will see you for three hours on Saturday.

The movie will premier for one day on May the 3rd.

### Indicating an Exact Time

We use the preposition 'at' to show an exact moment in time. Have a look:

He will pick me up at half past three.

She will see you at lunchtime.

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