Should Of

The following are errors in English:

* I should of known better.

* They could of beaten us.

* He must of left by now.

* an asterisk in front of a sentence denotes an ungrammatical sentence.

In good, grammatical English we say instead:

I should have known better.

They could have beaten us.

He must have left by now.

All these examples use the correct past forms of the modal verbs‏‎, should, could and must.


If we transcribe should have into the IPA it will look like this:

/ ʃəd hæv /

However, this is very precise, clearly spoken, English. If you listen to the language spoken naturally by a native British or American English speaker the pronunciation is very different. This is due to the way in which speakers will often slur the words together (known as elision).

Use Up/Down Arrow keys to increase or decrease volume.
Thus the speaker says instead:

/ ʃədəv /

Also, when we write informal English, we’ll often put:




Thus because of the pronunciation and the informal written version, some illiterate people have assumed that the correct English is should of (could of, must of etc) because this is what it sounds like.

Note that pronouncing should have as should of is fine however it must always be should have when written.

Did you know that if you subscribe to our website, you will receive email notifications whenever content changes or new content is added.
1. Enter your e-mail address below and click the Sign Me Up button.
2. You will receive an email asking you to confirm your intention of subscribing to our site.
3. Click the link in the email to confirm. That’s all there is to it!

Enter your email address below to subscribe to IWeb TEFL.

Note: if you wish to unsubscribe from our site, click the unsubscribe link at the bottom of the email you received.
Then indicate you no longer wish to receive our emails.

Thank You
IWeb TEFL Team

Posted in English Usage.

Leave a Reply