Nothing Gold Can Stay

by Robert Frost

Nature's first green is gold,

Her hardest hue to hold.

Her early leaf's a flower;

But only so an hour.

Then leaf subsides to leaf.

So Eden sank to grief,

So dawn goes down to day.

Nothing gold can stay.

Iheard him go down the stairs. 

I heard him going down the stair. 

I heard himwent down the stairs.

–

I saw her go dwon the stairs   stairs. 

I saw her going down the stairs.  

–

I sawthe book lying on the table. (not I saw the book lie …)

I couldsee Jack getting on thebus. (not I could see Jack get …)

Isaw her throwing stonesat the other children.

被动状态的两个例子

He was never heardto say ‘thankyou’ in his life. (not He was never heard say …)

I heard my namerepeated.

verb + doing

I practise playingpiano every day.

I enjoy playing piano but I don't have time to practiseplaying it every day.

I avoided making the same mistake.

I have finished reading the whole set of Harry Porter.

I gave up reading Robinson Crusoe, as I felt it was notinteresting at all.

He suggested making a plan before we go there.

Did she mind not getting the job?

Do you mind looking after the kids for one hour while I go out

Do your parents mind you leaving home?

verb + to do

I want to have a cup of tea.

They agreed to return all books this week.

He chose to travel by train.

I decided to buy her a gift for her birthday.

He didn't expect to finish the task so quickly.

I hope to get a blind box as my birthday gift.

I learnt to play Chinese chess when I was 8 years old.

My mother promised to buy me a new school bag

I tried very hard to fix the broken toy.

Take things of value with you when you leave
It took me 3 hours to travel there. 
take a photo/picture
to take the bus/train
to take a cab/taxi
Did the thief take anything valuable
Come in; take a seat.
When will you take the mid-term exams?
When did you take your driving test?
I am going to take a course in design
take a look
take a break
take a deep breath

take off
Please fasten the seat belt, the plane is about to take off.
to take off your coat
He took off my wet boots and made me sit by the fire.
I've decided to take a few days off next week.

take in
He took me in with a fake jade.
Police have taken a man in for theft.

Fish take in oxygen through their gills.

value/ˈvæljuː/
The winner will receive a prize to the value of 1 000.
Take things of value with you when you leave.

The lunch special is really good value. I bought the phone at a good price.  It is really value for money.
 
He didn't say anything of value.    
The book's value to me is great.
Fruits of high vitamin C are of high nutritional value

I really value him as my best friend.
He's a valued member of our team.


Valuable


 
I have a valuable collection of stamps


 a valuable experience/lesson
The book provides valuable information.

invaluable
invaluable information
The book will be invaluable for students in college
 His knowledge of the area made him invaluable.

Valueless 
 adjective
Such data are not valueless,.

Worthless 
 adjective
His paintings are worthless.

priceless
priceless information （invaluable information）
Our family photos are priceless.

If you give me onemore month, I can finish the job/task. 

If grandma calls,tell her I will be back by 3 p.m

Doyou mind if I turn the TV off? 

Do you mind if I open the window

Do you mind if I  the lastchocolate?

Do you mind if I use your phone

Do you mind if I ask you a fewquestions

I would be (very)grateful if you could go with me.

I'd be grateful ifyou could go with me.

I wouldbe grateful if you could tell me where I can get the book.

I wouldbe grateful if you could lendme the book.

I wouldbe grateful if you could pass the document to my teacher.

I wouldbe grateful if you could fix the computer by today.

Do you want to gowith me? 

What did she ask?

She asked me if Iwanted to go with her.

Did your mother buythe book for you? 

What did he ask?

He asked if my mother bought the book for me.

Have you been toBeijing before 

What did she ask?

She asked if I hadbeen to Beijing before. 

Will youtake the ipad with you?

What didhe ask?

He askedif I would take the ipad with me.