The cat snatched at the butterflies, but they fluttered away too quickly to be caught.
To communicate time
To communicate place
To communicate addition
To compare or contrast
To communicate cause
To communicate a condition
To communicate time: "before," "after," "during," "finally," "previously," "now," "soon"
To communicate place: "here," "there," "nearby," "inside," "outside," "everywhere"
To communicate addition: "also," "furthermore," "moreover," "in addition," "besides," "additionally"
To compare or contrast: "in contrast," "similarly," "likewise," "on the other hand," "however," "nevertheless"
To communicate cause: "because," "due to," "as a result," "since," "for this reason," "consequently"
To communicate a condition: "if," "unless," "provided that," "in case," "as long as," "on the condition that"