say	said said	
see	saw seen	
sell	sold sold	
send	sent sent	
shut	shut shut	
sing	sang sung	
sit	sat sat	
sleep	slept slept	
speak	spoke spoken	
stand	stood stood	
steal	stole stolen	
swim	swam swum
take	took taken	
teach	taught taught	
tell	told told	
think	thought thought	
throw	threw thrown	
understand	understood understood	
wear	wore worn	
win	won won	
write	wrote written