You say ' I know ' to show that you agree with what has just been said .
If you say that someone is a know-all, you are critical of them because they think that they know a lot more than other people.
to be the best guide, authority, etc.
→ see from (sense 11 )
Know-how is knowledge of the methods or techniques of doing something, especially something technical or practical .
You use you know to emphasize or to draw attention to what you are saying .
a person who has not reached a definite opinion on a subject, esp as a response to a questionnaire
to be aware that one could or should act better or think more correctly
an ignorant person
I know what:
I have an idea
in the know:
If you are in the know about something, especially something that is not known about or understood by many people, you have information about it.
to understand completely
know by name:
to have heard of without having met
If you say that someone is a know-it-all, you are critical of them because they think that they know a lot more than other people.
done or given only when it is essential that someone knows something
to know best:
If you say that a particular person knows best, you mean that they have a lot of experience and should therefore be trusted to make decisions for other people.
a person whose name one does not want to say, but who is known to the person to whom one is speaking
know by sight:
to be familiar with the appearance of without having personal acquaintance
know the area:
An area is a particular part of a town, a country, a region, or the world.
know the ropes:
to have a thorough understanding of a particular sphere of activity
know the score:
If you know the score, you know what the real facts of a situation are and how they affect you, even though you may not like them.
to know better:
If someone knows better than to do something, they are old enough or experienced enough to know it is the wrong thing to do.
you don't know:
You can say ' You don't know ' in order to emphasize how strongly you feel about the remark you are going to make.
you know what:
a thing or person that the speaker cannot or does not want to specify
you never know:
You say ' You never know ' or ' One never knows ' to indicate that it is not definite or certain what will happen in the future, and to suggest that there is some hope that things will turn out well .
as we know it:
If you talk about a thing or system as we know it, you are referring to the form in which it exists now and which is familiar to most people.
if you must know:
You say ' if you must know ' when you tell someone something that you did not want them to know and you want to suggest that you think they were wrong to ask you about it.
know one's onions:
to be fully acquainted with a subject
know one's place:
to be aware of one's inferior position
know one's stuff:
If you say that someone knows their stuff, you mean that they are good at doing something because they know a lot about it.
know what's what:
to know how one thing or things in general work
know your onions:
to know a great deal about a particular subject
what do you know:
People sometimes say ' What do you know ! ' when they are very surprised about something.
as far as I know:
You can use far in expressions like ' as far as I know ' and ' so far as I remember ' to indicate that you are not absolutely sure of the statement you are about to make or have just made, and you may be wrong .
I know the feeling:
You say ' I know the feeling ' to show that you understand or feel sorry about a problem or difficult experience that someone is telling you about.
know only by name:
to be familiar with the name of but not know personally
know when to stop:
If you say that someone does not know when to stop, you mean that they do not control their own behaviour very well and so they often annoy or upset other people.
to know full well:
If you say that a person knows full well that something is true, especially something unpleasant, you are emphasizing that they are definitely aware of it, although they may behave as if they are not.
to know no bounds:
If you say that a feeling or quality knows no bounds, you are emphasizing that it is very strong or intense .
to know the ropes:
If you know the ropes, you know how a particular job or task should be done .
what does sb know:
You can use expressions such as What does she know ? and What do they know? when you think that someone has no right to comment on a situation because they do not understand it.
know better than to:
not to be so stupid as to
know one's own mind:
to know one's own real thoughts, desires, etc.
know someone by sight:
If you know someone by sight, you can recognize them when you see them, although you have never met them and talked to them.
know something backwards:
to know something very well
not that I know of:
You say ' Not that I know of ' when someone has asked you whether or not something is true and you think the answer is 'no' but you cannot be sure because you do not know all the facts .
to get to know sb:
If you get to know someone, you find out what they are like by spending time with them.
to let someone know:
If you let someone know something, you tell them about it or make sure that they know about it.
I don't know about you:
You can say ' I don't know about you ' to indicate that you are going to give your own opinion about something and you want to find out if someone else feels the same.
I don't know how/what:
You use I don't know in expressions which indicate criticism of someone's behaviour . For example, if you say that you do not know how someone can do something, you mean that you cannot understand or accept them doing it.