As and Like

 

“As + noun” means “in the role of’.

Example: As your brother, I’ll help you as much as I can. (The speaker is the listener’s brother.)

 

“As” is used to describe the function of a person or object.

Example: He works as a teacher. He was using the pen as a knife.

 

“As” can also be used as a conjunction.

Example: Nobody loves me as you do.

 

“Like + noun” means “similar to” or “in the same way as”.

Example: Like your brother, I’ll help you as much as I can. (The speaker is not the brother but wishes to act in the similar way to the brother.)

 

“Like” is used as a preposition. It is used to compare two things.

Example: She looks like her mother. That house looks like a palace.

 

“Like” can also be used like a conjunction. (Connecting two clauses.)

Example: She looked like she was about to cry.