1.Mr Smith _ at this school since he _ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teachin; has come D:has been teaching; came2.When did you start raising money for the Great Green Wall?A:Since two years ago B:Two years ago

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1.Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teachin; has come D:has been teaching; came2.When did you start raising money for the Great Green Wall?A:Since two years ago B:Two years ago
1.Mr Smith ___ at this school since he ___ to Zhuhai.
A:has been taught; came B:has taught; has come
C:has been teachin; has come D:has been teaching; came
2.When did you start raising money for the Great Green Wall?
A:Since two years ago B:Two years ago
C:For two years D:Before two years

1.Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teachin; has come D:has been teaching; came2.When did you start raising money for the Great Green Wall?A:Since two years ago B:Two years ago
1.D
since后面是一个时间点,用过去时
since+过去的一个时间点表示从过去开始到现在的一段时间,所以前面用现在完成时
2.B
问句是问从什么时候开始,问的是过去的一个点时间,回答就应该是过去的某一点时间,即两年前

1.Dsmith先生来到深圳以后，一直在这个学校教书。
2.B问句里用的是did，所以回答的应该是一个时间点，A和C都表示时间段，D表达是错误的。

D has been doing sth
Mr Smith 自从来珠海后一直在教书. 前半句现在完成时,表示教书动作的持续,后一句表示来珠海的动作,因此用过去式
A
你什么时候开始攒钱去长城?
自从两年前.

第一题,第二个空用过去式,排除B C,因为句子的意思是他来后到现在一直在教书,所以用现在完成进行时;第二题，是说自从两年以前的某时刻，所以要用since
水平所限，解释有很多不足，还望见谅！！

1.填空:here are two tickets for a c___2.Mr Mott is free this afternoon(同义句）Mr Mott ___ ___ this afternoon 3.Mr Smith is busy working at school all day(同义句）Mr Smith is busy ____ ___ ___ at shool all day.4.___ New Year's Eve,people in .改句子,每空格一词 1.Mary comes from (Britain).对括号里提问 ___ ___does Mary come from?2.Miss Brown and Mr Smith are (American).对括号里提问___ ____are Miss Brown and Mr Smith?3.Xiao Ming is good at playing the piano.同义句转 1.mr smith is not at the office now.Can I()for you ? Mr.Smith wants to have his hair ___(cut) Why don't you ___(ask)Mr Smith for help 同义句转换Why don't you ask Mr Smith for help?___ ___ ask Mr Smith for help? Mr,smith will ____(到达)at our school next Wednesday Mr,smith will ____(到达)at our school next Wednesday I happened to meet Mr.Smith at the school gate.同意句转换I( )Mr.Smith at the school gate( )( ).2.I( )Mr.Smith at the school gate( )( ).3.I ( )( )Mr.Smith at the school gate( ). Who is the girl ___ Mr.Smith and Mrs.Smith .用恰当的介词填空. Did Mr Smith die many years ago的同义句 _____Mr Smith ___ _____for mang years? when you called on me ,I was ___ a visit to Mr Smith.A on B at C in D to 保持原句的意思:1.Lucy is good at Chinese.Lucy__ ____ ___Chinese.2.Mr Smith is from England.Mr Smith___ ___England.3.What nationality are you?What___ you___?4.It's time for bed.It's time___ ___ ____ ____.5.It's time for lunch.It's time___ ___ _ Mr Smith has nine daughters,and each has a brother.How many children does Mr Smith have at least? 史密斯先生去年戒烟了.mr smith ___ ___ last year.帮个忙 1.Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teachin; has come D:has been teaching; came2.When did you start raising money for the Great Green Wall?A:Since two years ago B:Two years ago Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teaching; has come D:has been teaching; came为什么选D?has been teaching是什么时态? Mr.Smith used to take a walk after supper.(保持原意）Mr.Smith ___ ___ take a walk after supper