Correct spelling, explanation: supposed is one of the most commonly used words in English. The word, however, derives from the Latin form suppositus, which meant set under. In fact, the word joined two other Latin words – sub and ponere, which meant from below and to place. In modern English, supposed functions as a verb or as an adjective in both formal and informal contexts.

Definition of supposed:
1. adjective – to have a duty to do something,
My daughter was supposed to clean the house after the party, but when I came back, it was a total mess.
2. adjective – with the intention of something,
How am I supposed to finish this project by the end of the week?
3. adjective – if you have a different opinion than others on something,
The supposed advantages of the gadget explain its high price, but for me, the latest model doesn’t change much from the previous one.

Phrases with supposed:
A few commonly used phrases with supposed are: a supposed reason, be supposed to, and not supposed to.
A supposed reason for the car accident was poor weather conditions, but the case is still being investigated.
Janet is supposed to inherit a fortune after her grandfather, which she is looking forward to.
You are not supposed to be here after all those mean things you said to your mother.

Incorrect spelling, explanation: supposed has a relatively easy spelling, but it is commonly misspelled. One of the most frequent mistakes is to spell supposed as suppost, which is probably the result of the pronunciation of supposed, which indeed might suggest that there is a -t sound at the end. In fact, however, the only correct spelling supposed.

Incorrect spelling

Incorrect spelling

Incorrect spelling