what did they do over the weekend 这个句子中的over 两方面：从语法上和从意思上分别该怎么理解?为什么可以用over?

span 和它的用法很相似的 和during的 也很接近
楼上说的对
over three years ，our hometown changed a lot

和during相近,这句话的意思是，他们在周末干了什么？

over 在…期间。
我觉得在这点上，和during 用法相近

整个．
OVER\"覆盖\",所以在此用.

句子的意思是这个周末你打算怎么度过?
over强调是在一定期间
over其他用法如下:
on top of,covering
· I put a blanket over the sleeping child.
我在睡着的孩子身上盖了一条毯子.
· He wore a thick coat over his ordinary coat.
他在普通的上衣上面又穿了一件厚外衣.
· He went to sleep with a newspaper over his face.
他脸上盖着一张报纸睡着了.
介词 prep.在…上方
above,higher than
· A lamp was hanging over the table.
桌子上方挂着一盏灯.
· There is a bridge over the river.
河上有 桥.
· The sky is over our heads and the ground is under our feet.
我们头上是天空,脚下是大地.
介词 prep.越过…；穿过
from one side to the other,across
· The boys climbed over the wall.
男孩子们爬过墙头.
· We went over the river in a boat.
我们坐船过了河.
· He jumped over the *.
他跳过了那条小溪.
介词 prep.遍及
in every part of
· He has travelled over the whole country.
他已经游遍了全国.
· The fog spread over the town.
雾遍全城.
介词 prep.多于；超过
more than
· He has lived in Beijing over two years.
他住在北京已两年多了.
· You have to be over 18 to see this film.
超过十八岁的人才能看这部电影.
· I have had this camera over ten years.
这部照像机我已经买了十年了.
介词 prep.关于
concerning,in regard to
· The corporal felt very sad over the death of the boy.
下士对男孩的死感到很悲伤.
· We look back over all that has happened during the last year.
我们回顾了在过去一年中所发生的一切.
介词 prep.以；用；借；借助于；由
by means of
· I heard the news over the radio.
我在无线电里听到了这条消息.
· They are talking over the telephone.
他们在通过电话谈话.
介词 prep.在…时
while
· Over a bottle of wine,he spoke to a friend.
他一边喝着酒一边和朋友说话.
介词 prep.职务高于
superior in rank,office
· Mr White is over me in the office.
怀特先生的职位比我高.
介词 prep.在…期间
during,throughout
· Over the years,he read widely.
在那些年中,他博览群书.
· He came to town over the weekend.
周末他进城了.
副词 adv.横过；从一边到另一边
across
· Let's row over to the other side of the river.
咱们把船划到河那边去吧.
· He will sail over to France.
他将渡海到法国去.
· I can see Henry over there.
我可以看见亨利在那儿.
副词 adv.从一处到另一处
from one place to another
· You must come over and see me.
你一定要过来看看我.
· I will go over to his office and have a talk with him.
我要到他办公室去找他谈一谈.
· Come over and see us on Sunday.
星期天请到我们这里来玩吧.
副词 adv.自始至终
through,from beginning to end
· He thought it over.
他仔细地想了想.
· I'll read the question over once more.
我得把问题从头到尾再读一遍.
副词 adv.重复地
in repetition
· Read it over.
再读.
· My sums were wrong and I had to do them over.
我的得数错了,我得重做.
副词 adv.向下；翻倒
down
· He tripped and fell over.
他绊倒了.
· I slipped on the ice and fell over.
我在冰上滑倒了.
副词 adv.翻转过来
so that the other side is on top
· The goat rolled over,dead.
山羊翻了一个身,死了.
· Turn the page over and you'll see a map.
把这页翻过去就可以看见一张地图.
· Turn your books over.
请把你们的书翻过来.
副词 adv.剩余；未用过
left,not used
· If there's any soup over,we can eat it tomorrow.
如果有汤剩下,我们可以明天吃.
· I gave him two glasses and still had three over.
我给了他两只玻璃杯,还余下三只玻璃杯.
· Five goes into eight once with three over.
五除八得一余三.
副词 adv.太；十分
too
· He is over polite.
他太客气了.
· I do not feel over well.
我并不十分健康.
副词 adv.完了；结束
ended,finished
· Our holidays will soon be over.
我们的假日就要结束了.
· We'll go out when the rain is over.
雨停了我们就出去.
· School is over.
放学了.