Simple:
* The raft bobbed gently on the water.
* We built a raft out of logs.
Descriptive:
* The rickety raft, patched with old tires and plastic sheeting, creaked ominously as we pushed off.
* The sun beat down on the brightly colored raft as we drifted down the river.
Figurative:
* He felt like a lone raft in a vast ocean of uncertainty.
* Her dreams were a fragile raft, easily overturned by the slightest breeze.
Action-oriented:
* They scrambled onto the raft, desperate to escape the rising tide.
* We paddled the raft through the calm, clear water.
The best sentence for "raft" will depend on the specific context you are using it in. Consider the tone, purpose, and audience of your writing.