在天黑之前用英文怎么说

They are supposed to arrive before dark.

it is geting dark now,we must start before the darkness.

根据两点之间直线最短,做A关于直线L的对称点,称为C,连接BC,BC与直线L的交点即为P点,因为AP=CP,AP+PB=BC.

1.我希望天黑之前读完这本书.__I hope to finish reading_________________the book before it is dark.
2.金钱可以给我们带来更好的生活,但不能给我们带来快乐.Money__can bring us a better life _________________but it can't bring us happiness.

陈述句：
1.Mary said,"These color pens are mine."
Mary said that those color pens were hers.
2.Lily says,"I’m taller than Jenny."
Lily says that she is taller than Jenny.
3.Ben said,"I'll be waiting for your call."
Ben said he would be waiting for my call.
4.My math teacher said to me,"You can do it better."
My math teacher told me that I could do it better.
5.He said,"I will come back tomorrow."
He sait he would come back the next day.
6.Our teacher told us,"The sun rises in the east."
Our teacher told us that the sun rises in the east.
7.David said,"I am having a party for my grandfather."
David said that he was having a party for his grandfather.
8.I asked,"What's Peter's address?"
I asked what Peter's address was.
9.He asked,"When is the new manager coming?"
He asked when the new manager was coming.
10.I asked,"How does she know my name?"
I asked how she knew my name.
祈使句：
1.“Stop talking!"the teacher said to the class.
The teacher asked the class to stop.
2."Open your books!"the teacher said to the class.
The teacher told the class to open their books.
3."Peter!Don't talk in class!"the teacher said.
The teacher told Peter not to talk in class.
4."Let's see the frog first."said the teacher.
The teacher suggested that we should see the frog first.
5."Stop talking,Peter!"the teacher said.
The teacher ordered Peter to shut up.

It's getting dark.It's almost morning.
It seems to be raining soon.
It seems the rain will stop soon.
What we need to do is to get there before dawn /dusk.

1.We must go now,or we won't get there before it's getting dark.
2.Please take more photos of my sister,and then send them to me.

They arrived at the bank before it's dark and decided to stay for night.

She should get to that city before dark.