1. as if - Conjunction
2. as if - Interjection
As though; in a manner suggesting.
The old man stumbled, as if he were about to fall.
In mimicry of.
When the teacher’s back was turned, the class clown would hold his stomach as if he were ill.
as if
(idiomatic) Refers to something that the speaker deems highly unlikely.
—I'm going to clean your whole house. —As if!
Whoever will not love his enemies cannot know the Lord and the sweetness of the Holy Spirit. The Holy Spirit teaches us to love our enemies in such way that we pity their souls as if they were our own children. Silouan the Athonite
Live among men as if God beheld you; speak with God as if men were listening. Seneca
Live as if you were to die tomorrow. Learn as if you were to live forever. Mahatma Gandhi
If you want to gather a lot of knowledge, act as if you are ignorant. Vietnamese Proverb
As if it weren't bad enough to fall, the ladder lands on top of you. Malawi Proverb
If a man leaves little children behind him, it is as if he did not die. Moroccan Proverb