There is, There are 存有

可數名詞:

There’s a book on the table (now).
There was a book on the table (yesterday).
There will be a book on the table (tomorrow).
There has been a book on the table (all day).
There had been a book on the table (this week).
There will have been a book on the table (this time next week).

There can be a book on the table (anytime).
There could be a book on the table (I don’t know).
There shall be a book on the table (soon).
There should be a book on the table (now).
There will be a book on the table (tomorrow).
There would be a book on the table (if…)
There could have been a book on the table (this week).
There should have been a book on the table (this morning).
There would have been a book on the table (if…)

There are books on the table (now).
There were books on the table (yesterday).
There will be books on the table (tomorrow).
There have been books on the table (all day).
There had been books on the table (this week).
There will have been books on the table (this time next week).

There can be books on the table (anytime).
There could be books on the table (I don’t know).
There shall be books on the table (soon).
There should be books on the table (now).
There will be books on the table (tomorrow).
There would be books on the table (if…)
There could have been books on the table (this week).
There should have been books on the table (this morning).
There would have been books on the table (if…)

不可數名詞:

There is bread on the table (now).
There is water on the table (now).
There is milk in the fridge (now).
There was bread on the table (earlier).
There was water on the table (yesterday).
There was milk in the fridge (last week).
There will be bread on the table (tomorrow).
There will be water on the table (in a minute).
There will be milk in the fridge (next week).

There has been bread on the table (all day).
There has been water on the table (all morning).
There has been milk in the fridge (all week).
There had been bread on the table (earlier this week).
There had been water on the table (before you took it).
There had been milk in the fridge (but I drank it).
There will have been bread on the table.
There will have been water on the table.
There will have been milk in the fridge.

There can be bread the table (anytime).
There could be bread on the table (I don’t know).
There shall be bread on the table (soon).
There should be bread on the table (now).
There will be bread on the table (tomorrow).
There would be bread on the table (if…)
There could have been bread on the table (this week).
There should have been bread on the table (this morning).
There would have been bread on the table (if…)

應用:

There were 2 earthquakes last month in China.
There have been many fires in the USA recently.
There could have been a fire if you weren’t careful.
There should be an exit here, but I don’t see it.
There should have been an exit here, but I didn’t see it.