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to be
01
是, 存在
used when naming, or giving description or information about people, things, or situations
Linking Verb: to be [adj] | to be sb/sth | to be to do sth
Example
My favorite color is blue.
This cake is delicious.
My grandmother was 90.
1.1
是
used for saying what something is made of
Linking Verb: to be particular constituent parts or material
Example
The building is a mix of brick and concrete.
Is your table solid wood?
The market was several bustling stalls and shops.
1.2
是, 构成
to express equality between things
Linking Verb: to be sth
Example
What is the value of 20 ounces in grams?
New York City is not the United States.
Let z be the result of the multiplication of m and n.
1.3
是, 价值
used for talking about the cost of something
Linking Verb: to be a particular price
Example
' What 's the price of the coffee machine? '
The meal at the restaurant was $ 50 per person.
The tomatoes are $ 2 per pound.
1.4
是
used for indicating who owns something or who it is meant for
Linking Verb: to be for sb | to be someone's
Example
This book is for Tim.
' Whose is this phone? '
' It 's not mine, and it 's not Tim 's. '
1.5
是, 重要
used for indicating how great the importance of something is to someone
Linking Verb: to be sth | to be [adj]
Example
The safety of our employees is our top priority.
The success of this project is crucial for the company 's future.
Your health should be paramount to you.
02
发生, 进行
to happen or take place
Intransitive: to be somewhere | to be point in time
Example
The seminar is on Monday morning.
The lecture is on Wednesday evening.
The eclipse was in August.
03
是
to have an existence
Linking Verb: to be sb/sth
Example
There are plenty of opportunities for improvement.
Is there a specific menu for vegetarians?
There 's an interesting story behind that old painting.
Example
The park is across the street.
The school is at the end of Maple Avenue.
The files are in the filing cabinet.
3.2
是, 存在
to have a presence
Intransitive: to be somewhere
Example
The children are in the backyard.
Is there a doctor in the house?
There was a police in the other room.
04
是
used for talking about time
Linking Verb: to be a specific time | to be [adj]
Example
It 's five minutes past nine.
It 's 3:45 in the afternoon.
It 's midnight, and the city is quiet.
05
是, 位于
used for talking about the weather
Linking Verb: to be [adj]
Example
It was cloudy this morning.
It is sunny and warm at the beach today.
It 's cold in Alaska, but it 's typically not too windy.
06
是
used in the perfect tenses to mean to go or visit
Intransitive: to be somewhere
Example
Has he been to the new restaurant downtown?
Have you ever been to Paris?
I have n't been to the beach in ages.
6.1
去, 来
used in the perfect tenses to mean to come or visit
Intransitive
Example
The plumber has been to repair the leaky faucet.
The repairmen have been to fix the plumbing issue.
Has the cleaning service been to tidy up the house?
07
她说, 她表示
used to express what someone has said
Example
During the negotiation, the client was like, " We need a better deal. "
During the meeting, the manager was like, " We need to improve our efficiency. "
She was all, " I ca n't believe you did n't tell me about the party! "
08
是
(auxiliary) used with the present participle form of a verb in forming progressive tenses
Example
The team is preparing for the upcoming match.
Are you writing your thesis for the conference?
They are discussing the upcoming event.
8.1
是, 成为
(auxiliary) used with the past participle form of a verb when forming the passive voice
Example
The decision was made by the committee.
The question was answered by the expert.
The book was read by thousands of people.
例子
My favorite color is blue.
This cake is delicious.
My grandmother was 90.
This novel is a bestseller.
This plant is a sunflower.
