Conjugation of strengthen [v.]
-strengthen
Istrengthen
youstrengthen
hestrengthens
westrengthen
youstrengthen
theystrengthen
Istrengthened
youstrengthened
hestrengthened
westrengthened
youstrengthened
theystrengthened
Iwillstrengthen
youwillstrengthen
hewillstrengthen
wewillstrengthen
youwillstrengthen
theywillstrengthen
Ihavestrengthened
youhavestrengthened
hehasstrengthened
wehavestrengthened
youhavestrengthened
theyhavestrengthened
-strengthening
-strengthened