to strengthen
Regular verb: strengthen - strengthened- strengthened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I don't strengthen
you don't strengthen
she doesn't strengthen
we don't strengthen
you don't strengthen
they don't strengthen 	I'mnot strengthening
youaren't strengthening
sheisn't strengthening
wearen't strengthening
youaren't strengthening
theyaren't strengthening	I didn't strengthen
you didn't strengthen
she didn't strengthen
we didn't strengthen
you didn't strengthen
they didn't strengthen 	Iwasn't strengthening
youweren't strengthening
shewasn't strengthening
weweren't strengthening
youweren't strengthening
theyweren't strengthening	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I haven't strengthened
you haven't strengthened
she hasn't strengthened
we haven't strengthened
you haven't strengthened
they haven't strengthened	I haven't  been strengthening
you haven't  been strengthening
she hasn't  been strengthening
we haven't  been strengthening
you haven't  been strengthening
they haven't  been strengthening	I hadn't strengthened
you hadn't strengthened
she hadn't strengthened
we hadn't strengthened
you hadn't strengthened
they hadn't strengthened	I hadn't been strengthening
you hadn't been strengthening
she hadn't been strengthening
we hadn't been strengthening
you hadn't been strengthening
they hadn't been strengthening	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I won't strengthen
you won't strengthen
she won't strengthen
we won't strengthen
you won't strengthen
they won't strengthen 	I won't be strengthening
you won't be strengthening
she won't be strengthening
we won't be strengthening
you won't be strengthening
they won't be strengthening	I won't have strengthened
you won't have strengthened
she won't have strengthened
we won't have strengthened
you won't have strengthened
they won't have strengthened	I won't have been strengthening
you won't have been strengthening
she won't have been strengthening
we won't have been strengthening
you won't have been strengthening
they won't have been strengthening	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I wouldn't strengthen
you wouldn't strengthen
she wouldn't strengthen
we wouldn't strengthen
you wouldn't strengthen
they wouldn't strengthen 	I wouldn't be strengthening
you wouldn't be strengthening
she wouldn't be strengthening
we wouldn't be strengthening
you wouldn't be strengthening
they wouldn't be strengthening	I wouldn't have strengthened
you wouldn't have strengthened
she wouldn't have strengthened
we wouldn't have strengthened
you wouldn't have strengthened
they wouldn't have strengthened	I wouldn't have been strengthening
you wouldn't have been strengthening
she wouldn't have been strengthening
we wouldn't have been strengthening
you wouldn't have been strengthening
they wouldn't have been strengthening	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to strengthen 	 	do not strengthen
Let's not strengthen
do not strengthen 	 	

Participle 	
Present 	Past 	 	 	
strengthening	strengthened