spend 花费，主语是人
sb+spend + 时间/ 金钱 + on sth 在....上花多少时间/金钱
sb.spend + 时间/金钱 + (in)doing sth 在做...上花多少时间/金钱
sb
spend
some
money/some
time
in
doing
sth
某人花费金钱/时间做某事
eg:
i
spent
half
an
hour
in
doing
my
homework
yesterday.
和它意思相近的还有take有关的句型
it
takes/took
sb
some
time/some
money
to
do
sth
上面的句子用这个句型可以转换为
it
took
me
half
an
hour
to
do
my
homework
yesterday.
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