Before how to use, good chasing points

It is generally used in the middle of a sentence.

1: The problem with the greater than sign refers to the sub-selector.

The header span is written like this, and the style should be applied to both the son's span and the grandchildren's span under the header;

The header>span is written like this, and the style of the child span under the header;

2::before pseudo-element adds content before the element.

after pseudo-element adds content after the element.

These 2 pseudo-elements allow the creator to insert the generated content at the front and back of the element's content. By default, this pseudo-element is an inline element, but this can be changed using the display property. This pseudo-class is not supported by IE6 7.

For example, explain.

clearfix:after

This means that an element named clerfix is added to the end of the content as a "."and set block-level elements, hidden, and so on.

clearfix:before, .clearfix:after.clearfix:after

This section is cleared floating.

container > header > span heel. The container header span (which defines all spans at this location) is different:

This is to define all child spans under the container (note that this style is not applied if the grandchild has the same name).

container > header > span span:after {

width: 30px;

height: 30px;

left: -12px;

font-size: 50%;

top: -8px;

font-size: 75%;

position: relative;

This span inserts a box 30px wide and 30px high, -12px from the left and -8px from the top

This is the neighbor sibling selector, xx>yy

Represents the selection of all sibling yy elements that appear immediately after the xx element.

In fact, it is a clear float.

"Before coming here," said one child, "I thought swimming was running over an open fire faucet". "Here" refers to a summer camp located just 1 hour from New York City, but it's a whole other world. This camp and four other nearby ones are run by Fresh Air**.

Since 1877, the Society has been helping poor children from New York City spend their summer vacations in the suburbs. More than 10,000 children between the ages of 6 and 18 participate in the program every year. Some of them will stay at the campsite, others will stay with the host family, who will pay for everything.

The camps are for children between the ages of 8 and 15. At the camp, children can learn about galaxies, see fawns, cows and other animals, go hiking, fishing, and of course, swim. Children can learn to be responsible by helping each other in daily life, such as making beds, preparing meals, etc.; They can also learn a lot from counselors, who are often college students from all over the United States or other countries.

Host families from 13 states and volunteers from Canada will bring the children together for the summer vacation. Many families have children of their own. Visiting children become part of the family, going on picnics with the family, going to the pool or beach, going on tours.

The first time to enter the host family are children between the ages of 6 and 12, who will mostly be invited again. Some children and family members have become lifelong friends.

"Before I came here," said one child, "I thought swimming was running in a fire extinguisher." ”

It's "a summer camp, just an hour away from New York City, but it's really a world away. This summer camp, along with four in the neighborhood, is run by Fresh Air **. Beginning in 1877, this ** helped poor children in New York City spend their summer vacations in the countryside.

Every year, more than 10,000 children, aged 6 to 8, participate in the program. Some of the children stayed in tents, while others stayed with local homes. This ** pays all the fees.

Tents are for children between 8 and 15 years old. In the tent, children can learn about the stars, meet deer, cows and other animals, go hiking, go fishing and, of course, swim. Children learn responsibilities by helping with household chores, such as making beds and working as waitresses.

They also learn a lot from counselors, who are usually college students from the United States and other countries.

Host families from 30 states and volunteers from Canada spent the summer with the children, many of whom had children of their own. The visiting child becomes part of the family. They go on picnics together, go to pools and beaches, go on trips.

The children were all 6 to 12 years old when they first went, so most of them would be invited back again. Some of these children have become lifelong friends with their host families.

It's finally written.,I hope it can help you.,I hope you adopt it.

"Before I came here," said one child, "I thought swimming was running through the spray of a fire hydrant." ”

"Here" refers to a summer camp stronghold just an hour from New York City — yet as far away as the whole world. Fresh Air** is responsible for providing all expenses for this summer camp and four other in its vicinity. Since 1877, this money has been used to provide a rural summer retreat for the children of poor people in New York City.

Every year, at least 10,000 children between the ages of 6 and 18 take part in this activity, some of whom live in summer camps and others in nearby accommodations, all at the expense of this activity.

Summer camps are designed for children between the ages of 8 and 15. During this time, children can learn astronomy, observe deer and cows and other animals, as well as climb, fish, and, of course, swim. They develop a sense of responsibility by learning to make their beds, wait for meals, and other daily chores, and they benefit greatly from their instructors, who are mostly college students in the United States and other countries.

Hosts from 13 U.S. states and Canada volunteer to accommodate the children. Many of them have children of their own. The children who visited became part of their families and joined them in picnics, bathing in the pools, chilling on the shore, and going on outings.

The children first visit between the ages of 6 and 12, and most are invited to return for more. Some children and their families are bonded for life.

1，so...That sentence structure.

2, to express surprise, of course, to use negative, can not imagine.

3. It means that you bring it when you come.

No, to use the negative.

6.The first hard adjective, which means that the rain is heavy, and the second one means that it is negative 7, put sth away, and the fixed sentence pattern is 8, and do not go to sleep until the homework is completed.

9, while generally follows the ongoing tense.

Hey, I almost forgot about it.