搜狗做题网自己不太确定,并说明理由.
来源：学生作业帮 编辑：搜狗做题网作业帮 分类：英语作业 时间：2024/05/31 16:02:39
自己不太确定,并说明理由.
1.they have been in the library since___ A a long time ago B it had been open C eight o'clock D two hours
2.this is the first time I ___here A was B have been Ccame D am coming
3.Miss Green isn't in the office.she ___to the library.A has gone B went C will go D has been
4.It____ be my uncle.he has gone to beijing.A must B can C mustn't D can't
1.they have been in the library since___ A a long time ago B it had been open C eight o'clock D two hours
2.this is the first time I ___here A was B have been Ccame D am coming
3.Miss Green isn't in the office.she ___to the library.A has gone B went C will go D has been
4.It____ be my uncle.he has gone to beijing.A must B can C mustn't D can't
CBAD
1：a作壮语前面不加介词,b since加从句 从句用一般过去时,c对 ,d since加时间点 for加一段时间
2：固定用法 this is the first time i have done sth
3：a对,b对现在造成影响,要用现完时态c显然不对 将要去的意思d表示曾经去过某地
4：根据句意思判断这不可是叔叔 must not 表示禁止 can not 表示不可能是
再问： 第三题中 A D 不都是现在完成时吗，有什么具体的区别吗
再答： a 表示去了某地 还没有回来 或还在路上 d 表示曾经去过某地 亲 望采纳
1：a作壮语前面不加介词,b since加从句 从句用一般过去时,c对 ,d since加时间点 for加一段时间
2：固定用法 this is the first time i have done sth
3：a对,b对现在造成影响,要用现完时态c显然不对 将要去的意思d表示曾经去过某地
4：根据句意思判断这不可是叔叔 must not 表示禁止 can not 表示不可能是
再问： 第三题中 A D 不都是现在完成时吗，有什么具体的区别吗
再答： a 表示去了某地 还没有回来 或还在路上 d 表示曾经去过某地 亲 望采纳