I. BEING SURE
/sɜ:(r)t(ə)n/
Frequency: The word is one of the 3000 most common words in English.
1.
If you are certain about something, you firmly believe it is true and have no doubt about it. If you are not certain about something, you do not have definite knowledge about it.
She’s absolutely certain she’s going to make it in the world...
We are not certain whether the appendix had already burst or not...
It wasn’t a balloon–I’m certain of that.
= sure
ADJ : v-link ADJ , oft ADJ that / wh , ADJ of/about n
2.
If you say that something is certain to happen, you mean that it will definitely happen.
However, the scheme is certain to meet opposition from fishermen’s leaders...
Brazil need to beat Uruguay to be certain of a place in the finals...
The Prime Minister is heading for certain defeat if he forces a vote...
Victory looked certain.
ADJ : oft ADJ to-inf , it v-link ADJ that / wh , ADJ of n / -ing
3.
If you say that something is certain , you firmly believe that it is true, or have definite knowledge about it.
One thing is certain, both have the utmost respect for each other...
It is certain that Rodney arrived the previous day.
ADJ : v-link ADJ , oft it v-link ADJ that / wh
4.
If you know something for certain , you have no doubt at all about it.
Hill had to find out for certain.
PHRASE : PHR with cl (not first in cl )
5.
If you make certain that something is the way you want or expect it to be, you take action to ensure that it is.
Firstly, they must make certain that their pension needs are adequately catered for...
= make sure
PHRASE : V inflects
II. REFERRING AND INDICATING AMOUNT
/sɜ:(r)t(ə)n/
Frequency: The word is one of the 1500 most common words in English.
1.
You use certain to indicate that you are referring to one particular thing, person, or group, although you are not saying exactly which it is.
There will be certain people who’ll say ‘I told you so!’...
Leaflets have been air dropped telling people to leave certain areas.
ADJ : det ADJ , ADJ n
2.
When you refer to certain of a group of people or things, you are referring to some particular members of that group. ( FORMAL )
They’ll have to give up completely on certain of their studies.
= some
QUANT : QUANT of def-pl-n
3.
You can use a certain before the name of a person in order to indicate that you do not know the person or anything else about them.
She managed to arrange for them to be hidden in the house of a certain Father Boduen.
ADJ : a ADJ n-proper
4.
You use a certain to indicate that something such as a quality or condition exists, and often to suggest that it is not great in amount or degree.
That was the very reason why he felt a certain bitterness...
ADJ : a ADJ sing-n / n-uncount