1 must 改为could
2 must rain 改为 must have rained
neednot to neednot have to
would 改为 may
will not paid 改为 would not pay
mustnot 改为 could not
need have must have
so 改为 as
successes 改为success 不可数
will have got 改为 got
1 must 改为could
2 must rain 改为 must have rained
neednot to neednot have to
would 改为 may
will not paid 改为 would not pay
mustnot 改为 could not
need have must have
so 改为 as
successes 改为success 不可数
will have got 改为 got