作业帮it spent half an hour working out the pysics problem.(保持原意）it ______ half an hour _____ him _____ _______out the physics problem.the physics problem________him half an hourit takes sb.sometime to do sth.不是固定搭配么？为什么能
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it spent half an hour working out the pysics problem.(保持原意）it ______ half an hour _____ him _____ _______out the physics problem.the physics problem________him half an hourit takes sb.sometime to do sth.不是固定搭配么？为什么能
it spent half an hour working out the pysics problem.(保持原意）
it ______ half an hour _____ him _____ _______out the physics problem.
the physics problem________him half an hour
it takes sb.sometime to do sth.不是固定搭配么？为什么能用take ...for?
还有spent的主语不是人么？it 后应该不能用spent吧？
it spent half an hour working out the pysics problem.(保持原意）it ______ half an hour _____ him _____ _______out the physics problem.the physics problem________him half an hourit takes sb.sometime to do sth.不是固定搭配么？为什么能
tooks/for/to work
costed
it takes sb.sometime to do sth的确是固定搭配.
这里的 for 不是跟take搭配着当词组用的.
你可以把它当做一个插入语
就像你可以把to me,it is important to do this 写成
it is important for me to do this.
这里有些例句.
It took half an hour for the substance to be salted out.
花了半个小时这种物质才盐析出来.
After the explosion,it only took half an hour for the ship to go under.
这艘船一声爆炸,半小时后就沉没了.
哎,有些东西要意会啊..
took of to work
took/costed
took/ for/ to work
cost
took(过去时）;for（对于某人来说）;to work（句型SOMETHING TAKES SB. TO DO STH.);cost（过去时）
took/of/to work
costed
took for; to figure / to work 也可以，但是在加拿大课堂上，洋人老师会用figure out作为一个替换。
cost
take 为一般现在是
而took 是 take 的一般过去时
因为这里表示题已经解出来，所以要用过去时表示