since与for；have gone to与have be

用since或for填写 1. We have learned five lessons ____the beginning of this tern. 2.Mrs.Liao has been in hospital ____last week. 3.I have stayed at my aunt ' s ____two week. 用have gone或have been填空 1.---Where are the boy students? ---They ____to the school factory. 2.---Is your father in ? ---No,he ___to ShenZhen. ---____he ever____there before? ---Yes,he ____there several time. 老师请做一下，并告诉我这几个词的用法和为什么填这个词。谢谢老师。

解题思路： 如下
解题过程：
用since或for填写
1. We have learned five lessons __since__the beginning of this tern.
2.Mrs.Liao has been in hospital ____since__last week.
3.I have stayed at my aunt ' s ___for _two weeks.
解析：
Since+过去点的时间，for+一段时间（数词+量词），此划线部分用how long提问。
一、since短语或从句表示过去的动作延续至今，since之后的时间为一点。 如：
Mr. Smith has worked here since 1984. 1984年以来，史密斯先生一直在这工作。
He’s learned about 5,000 English words since he went to college.
他上大学以来大约学了五千个英语单词。
二、for短语表示动作延续多长时间，for的宾语为时间段。 如：
We have known each other for twenty years. 我们认识有二十年了。
I haven’t seen her for a long time. 我好久没有见到她了。

用have gone或have been填空
1.---Where are the boy students?
---They __have gone __to the school factory.
2.---Is your father in ?
---No,he _has gone __to ShenZhen.
---__Has__he ever___been _there before?
---Yes,he __has been __there several time.
解析： 1) have gone to意为“到某地去”，说话时该人不在现场，一般不用第一人称、第二人称代词作句子的主语。如：—Where is Jim？———吉姆在哪里？ —He has gone to England．———他去英国了。（尚未回来） Mr Wang isn't here．He has gone to Qingdao．王先生不在这里。他去青岛了。 2) have been to意为“曾经去过某地”，现在已不在那里了，后可接次数，如once，twice，three times等，表示“去过某地几次”，也可和 just，never，ever等连用。如： My father has been to Beijing twice．我父亲去过北京两次。 I have never been to the Great Wall．我从未去过长城。
最终答案：略