假若的英文：
if
supposing
in case

Get the axe
斧子弓箭是印第安人的主要武器,假若有人违反族规就会被宣布为不受欢迎的分子而被逐出。

I will come if nothing intervenes.
假若没有别的事，我一定来。

If you're constipated you should eat more roughage.
假若便秘就应该多吃粗糙食物.

You can do what you want if it is provided that you will not Bother us.
"假若你不会干扰我们,你可以做你想做的事。"

If you think deafness is funny, you've got a very misplaced sense of humour
假若认为耳聋有趣,这种幽默感十分不当.

To the best of my recollection,ie if I remember correctly
就我记忆所及(假若我没记错的话)

This oatmeal lumps if you dont stir it well
假若你不好好搅动,这麦片粥会结块的。

If anyone ever asks her how old she is, she always answers, 'My dear, it must be terrible to be grown up!'
假若有人问她多大年纪,她部是回答,'亲爱的,人长大了,一定很可怕!'

He would not have succeeded in such a risky business if he had not been such a clever entrepreneur.
假若他不是那么精明强干的企业家,就不会在这样冒险的事业中取得成功.

If you make idle, dissipated people your companions, you're sure to go the bad.
假若你结交上闲散、挥霍的人，你一定会堕落。

But as I suppos'd, to dress some of their barbarous diet, of humane flesh, which they had brought with them, whether alive or dead I could not know.
我想,他们一定是带来了战俘在烧烤人肉,至于那些战俘带上岛时是活是死,我就不得而知了。

Or who would ha' suppos'd we were sail'd on to the southward to the truly barbarian coast, where whole nations of Negroes were sure to surround us with their canoes, and destroy us;
没有人会想到,我们会驶向南方野蛮人出没的海岸。到那儿,我们还来不及上岸,就会给各个黑人部族的独木舟所包围,并把我们杀害；

You're supposed to be the outsider of this game.
你在这场比赛不被看好。

You are not supposed to play football in the classroom.
在教室里是不准踢足球的。

You're not supposed to smoke here.
你不可以在这儿抽烟。