Contraction for they are (They're trying to set a record for the largest pumpkin ever grown) 

Their

The opposite of "Here" indicates a place (Up there!) 

An adverb meaning without doubt, clearly (They will definitely not be going back to the zoo after the monkey incident.) 

Defiantly 

a verb meaning to receive, to answer yes, or to hold as true (He would have to accept the consequences of filling his sister bathtub with tarantulas) 

a preposition (and sometimes conjunction) meaning apart from or excluding (He cleaned  the ketchup off of all the walls except for one in the dining room.)

affect

Noun meaning as a result (She did a study of the effect of the full moon on werewolves.) 

Then 

Conjunction for comparison (Her mother said that she is not allowed to have more than 5 cats at a time. )