Label the parts of speech in the sentence; emily is always careful with tania's stuff.

Emily: noun (a noun could be the name of a person, thing, place, etc. In this case is the name of a person).

is: verb (it express action)

always: adverb (an adverb is a modifier of a verb, an adjective or another adverb. In this case, it is modifying the word "careful").

careful: adjective (an adjective modifies or describes a noun or a pronoun. In this case it is describing Emily, which is a noun.)

with: preposition (a preposition is placed before a noun or a pronoun to modify the phrase. In this case it is placed before the noun "Tania").

Tania: noun (The name of a person).

's: Possessive adjective (modifies the noun "Tania").  

stuff: noun (the name of a thing).

i think the answer might compound

imparadis't in one anothers arms  

the happier eden, shall enjoy their fill  

of bliss on bliss, while i to hell am thrust,  

where neither joy nor love, but fierce desire,  

among our other torments not the least,  

still unfulfill'd with pain of longing pines;  

yet let me not forget what i have gain'd  

from their own mouths; all is not theirs it seems:  

one fatal tree there stands of knowledge call'd,  

forbidden them to taste: knowledge forbidd'n?  

suspicious, reasonless. why should their lord  

envie them that? can it be sin to know,