About I have learnt

Hai  friends good morning ,

 I learnt about tenses

 Three main tenses for example

 1- present tense

2- Past tens

 3- Future tense

  Sub tenses of  three main tenses

  there are many tenses  as such as

1-Smple present tense

2- simple past tense
3- Simple future tense 
    I have learnt about tenses  they gave lot of examples.