| I | concenter |
| you | concenter |
| he/she/it | concenters |
| we | concenter |
| you | concenter |
| they | concenter |
| I | have concentered |
| you | have concentered |
| he/she/it | has concentered |
| we | have concentered |
| you | have concentered |
| they | have concentered |
| I | concentered |
| you | concentered |
| he/she/it | concentered |
| we | concentered |
| you | concentered |
| they | concentered |
| I | had concentered |
| you | had concentered |
| he/she/it | had concentered |
| we | had concentered |
| you | had concentered |
| they | had concentered |
| I | will concenter |
| you | will concenter |
| he/she/it | will concenter |
| we | will concenter |
| you | will concenter |
| they | will concenter |
| I | will have concentered |
| you | will have concentered |
| he/she/it | will have concentered |
| we | will have concentered |
| you | will have concentered |
| they | will have concentered |
| I | am concentering |
| you | are concentering |
| he/she/it | is concentering |
| we | are concentering |
| you | are concentering |
| they | are concentering |
| I | have been concentering |
| you | have been concentering |
| he/she/it | has been concentering |
| we | have been concentering |
| you | have been concentering |
| they | have been concentering |
| I | was concentering |
| you | were concentering |
| he/she/it | was concentering |
| we | were concentering |
| you | were concentering |
| they | were concentering |
| I | had been concentering |
| you | had been concentering |
| he/she/it | had been concentering |
| we | had been concentering |
| you | had been concentering |
| they | had been concentering |
| I | will be concentering |
| you | will be concentering |
| he/she/it | will be concentering |
| we | will be concentering |
| you | will be concentering |
| they | will be concentering |
| I | will have been concentering |
| you | will have been concentering |
| he/she/it | will have been concentering |
| we | will have been concentering |
| you | will have been concentering |
| they | will have been concentering |
| I | would concenter |
| you | would concenter |
| he/she/it | would concenter |
| we | would concenter |
| you | would concenter |
| they | would concenter |
| I | would have concentered |
| you | would have concentered |
| he/she/it | would have concentered |
| we | would have concentered |
| you | would have concentered |
| they | would have concentered |
| I | would be concentering |
| you | would be concentering |
| he/she/it | would be concentering |
| we | would be concentering |
| you | would be concentering |
| they | would be concentering |
| I | would have been concentering |
| you | would have been concentering |
| he/she/it | would have been concentering |
| we | would have been concentering |
| you | would have been concentering |
| they | would have been concentering |
| You | concenter |
| we | Let's concenter |
| You | concenter |