| Simple | Progressive | Perfect | Progressive |
| Present |
| I endeavour |
| you endeavour |
| he/she/it endeavours |
| we endeavour |
| you all endeavour |
| they endeavour |
|
| I am endeavouring |
| you are endeavouring |
| he/she/it is endeavouring |
| we are endeavouring |
| you all are endeavouring |
| they are endeavouring |
|
| I have endeavoured |
| you have endeavoured |
| he/she/it has endeavoured |
| we have endeavoured |
| you all have endeavoured |
| they have endeavoured |
|
| I have been endeavouring |
| you have been endeavouring |
| he/she/it has been endeavouring |
| we have been endeavouring |
| you all have been endeavouring |
| they have been endeavouring |
|
| Past |
| I endeavoured |
| you endeavoured |
| he/she/it endeavoured |
| we endeavoured |
| you all endeavoured |
| they endeavoured |
|
| I was endeavouring |
| you were endeavouring |
| he/she/it was endeavouring |
| we were endeavouring |
| you all were endeavouring |
| they were endeavouring |
|
| I had endeavoured |
| you had endeavoured |
| he/she/it had endeavoured |
| we had endeavoured |
| you all had endeavoured |
| they had endeavoured |
|
| I had been endeavouring |
| you had been endeavouring |
| he/she/it had been endeavouring |
| we had been endeavouring |
| you all had been endeavouring |
| they had been endeavouring |
|
| Future |
| I will endeavour |
| you will endeavour |
| he/she/it will endeavour |
| we will endeavour |
| you all will endeavour |
| they will endeavour |
|
| I will be endeavouring |
| you will be endeavouring |
| he/she/it will be endeavouring |
| we are endeavouring |
| you all will be endeavouring |
| they will be endeavouring |
|
| I will have endeavoured |
| you will have endeavoured |
| he/she/it will have endeavoured |
| we will have endeavoured |
| you all will have endeavoured |
| they will have endeavoured |
|
| I will have been endeavouring |
| you will have been endeavouring |
| he/she/it will have been endeavouring |
| we will have been endeavouring |
| you all will have been endeavouring |
| they will have been endeavouring |
|
