I strengthen you strengthen she strengthens we strengthen you strengthen they strengthen
Present continuous
I am strengthening you are strengthening she is strengthening we are strengthening you are strengthening they are strengthening
Preterite
I strengthened you strengthened she strengthened we strengthened you strengthened they strengthened
Preterite continuous
I was strengthening you were strengthening she was strengthening we were strengthening you were strengthening they were strengthening
Present perfect
I have strengthened you have strengthened she has strengthened we have strengthened you have strengthened they have strengthened
Present perfect continuous
I have been strengthening you have been strengthening she has been strengthening we have been strengthening you have been strengthening they have been strengthening
Pluperfect
I had strengthened you had strengthened she had strengthened we had strengthened you had strengthened they had strengthened
Pluperfect continuous
I had been strengthening you had been strengthening she had been strengthening we had been strengthening you had been strengthening they had been strengthening
Future
I will strengthen you will strengthen she will strengthen we will strengthen you will strengthen they will strengthen
Future continuous
I will be strengthening you will be strengthening she will be strengthening we will be strengthening you will be strengthening they will be strengthening
Future perfect
I will have strengthened you will have strengthened she will have strengthened we will have strengthened you will have strengthened they will have strengthened
Future perfect continuous
I will have been strengthening you will have been strengthening she will have been strengthening we will have been strengthening you will have been strengthening they will have been strengthening
Conditional
Present
I would strengthen you would strengthen she would strengthen we would strengthen you would strengthen they would strengthen
Present continuous
I would be strengthening you would be strengthening she would be strengthening we would be strengthening you would be strengthening they would be strengthening
Past
I would have strengthened you would have strengthened she would have strengthened we would have strengthened you would have strengthened they would have strengthened
Past continuous
I would have been strengthening you would have been strengthening she would have been strengthening we would have been strengthening you would have been strengthening they would have been strengthening