It + be + complementUse this pattern for weather, time, dates, and distance. It does not point to a thing in the room.
Use it for weather, time, distance, and comments like It seems strange. Use there is/are to say that something exists or appears.
It + be + complementUse this pattern for weather, time, dates, and distance. It does not point to a thing in the room.
It + seem/appear + complement or clauseUse it when the sentence gives an impression or comment about a situation.
There + be + noun (+ place/time)Use there + be to say that something exists or is present. Choose is/are from the noun after it.
It is cold today.
Weather uses it.
Use it for conditions around you and clock time: It is windy. It is 8:30. The sentence does not introduce a thing; it gives a general condition.
Use there is/are when you present something new: There is a message on your desk. There are two people outside.
Use it in comments and impressions: It seems quiet here. It appears that Maria is right.
This rule chooses between it and there. The rule there-is-there-are goes deeper into forms, negatives, and questions with there + be.
They do different jobs. It gives a general condition or comment; there introduces something that exists.
In there is/there are, there helps introduce existence. It does not mean a specific place by itself.
IT_FOR_WEATHER_TIME_DISTANCEw5Use it when no person or thing is the real subject: weather, clock time, dates, and distance. Say It is cold, It is late, It is Monday, It is five miles.
IT_WITH_SEEM_APPEARw4Use it in patterns like It seems strange or It appears that Tom is busy. The sentence comments on a situation, not on a thing in the room.
THERE_IS_FOR_EXISTENCEw5Use there + be when you introduce something for the first time or say that it exists in a place or situation. Say There is a problem, There are two chairs in the kitchen.
MATCH_BE_TO_NOUN_AFTER_THEREw5With there + be, the verb matches the noun that comes next. Use is with a singular noun and are with a plural noun.
CHOOSE_IT_OR_THERE_BY_MEANINGw5Choose it when the sentence gives a general condition or comment. Choose there when the sentence introduces a person or thing as existing.