英语语法问题whenifirstcametothishouse,itwasaveryquietarea.butsinceaschool(wasbuilt)hereit(hasbecome)verynoisy.是不是由于是SINCE后面所以才用一般过去时,然后IT后面用完成时哦,.mywife(isforevercrit

Question

英语语法问题
when i first came to this house,it was a very quiet area.but since a school (was built) here it (has become) very noisy.
是不是由于是SINCE后面所以才用一般过去时,然后IT后面用完成时哦,.
my wife (is forever criticizing me )
是不是由于这个是反复的过程.还有一个选项是foreve criticizes me 我选了这个.要这么排除这个错误的答案哦,看起来一般现在时也没怎么错哦.
my neighbor (is practising) violin;she usually practises at about this time.
我选的是used to practise.是不是由于USUALLY的缘故哦?在逻辑上感觉用USED TO 还是蛮通的,.
(it is) four years since John left school.
这个可以用it has been吗?呵,看到SINCE总会想到．
the information is urgently (needed)
是因为被动式所以才变成这样的吗?
i'll take down your name and address in case you (are needed) as a witness.
后面也是被动式吗?IN CASE YOU ARE NEEDED AS A WITNESS能不能翻译下．
"i thought you were building a shi.Why not put it in the lake?"
"Because it wasn't finished yet"
这句为什么不能用hasn't finished yet,是因为在对话吗?
if a box weighs 10 kilograms,an upward force of 10 kilograms (must be exerted).
这个用is exerted为什么不行哦,是句中的语境吗要填MUST BE
the pressure of water in the pipe (may be compared) to the electric potentiral.
MIGHT为什么是行哦?是因为被动式吗,那MIGHT

Answer 1

SINCE用于完成时且SINCE后面跟点时间,所以是过去的某个时刻,用过去时主语后有is 这个系动词,后面跟动名词,是系表结构,不能直接跟动词原形,且my wife 正在criticizing me ,是进行时.由she usually practises at about...