假如一个人失踪七年,即看作已经死亡。用英语怎么说？

假如一个人失踪七年,即看作已经死亡。

If a person is missing for seven years,he is presumed dead.

if

conj. 如果，倘若，即使，〈口〉是否，假设；n. 条件，设想；

例句
She was old enough to absent herself from the lunch table if she chose...
她长大了，可以自己做主不来吃午餐了。

person

n. 人，（语法）人称，身体，容

例句
A sick person needs absolute confidence and trust in a doctor.
病人需要对医生有绝对的信心和信任。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

missing

adj. 失去的，下落不明的；v. 错过( miss的现在分词)；

例句
A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

seven

num. 七，七个，第七；n. 七，七个；

例句
His wife was sentenced to seven years imprisonment for aiding and abetting him...
他的妻子作为他的从犯被判入狱7年。

years

n. 年( year的名词复数 )，年纪，一年的期间，某年级的学生；

例句
His wife was sentenced to seven years imprisonment for aiding and abetting him...
他的妻子作为他的从犯被判入狱7年。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

presumed

v. 以为，假定( presume的过去式和过去分词 )，推定，妄行，冒昧地做某事；

例句
Statutes are not to be presumed to derogate from international law.
不能认为制定法贬损国际法.

dead

adj. 死去的，完全的，无感觉的，呆板的；adv. 完全地，非常，绝对，极度；n. 死者，（死一样的）寂静，极寒时候；

例句
According to police accounts, Mr and Mrs Hunt were found dead on the floor of their kitchen.
据警方称，亨特夫妇被发现死在家里厨房的地板上。