| Simple | Progressive | Perfect | Progressive |
| Present |
| I curb |
| you curb |
| he/she/it curbs |
| we curb |
| you all curb |
| they curb |
|
| I am curbing |
| you are curbing |
| he/she/it is curbing |
| we are curbing |
| you all are curbing |
| they are curbing |
|
| I have curbed |
| you have curbed |
| he/she/it has curbed |
| we have curbed |
| you all have curbed |
| they have curbed |
|
| I have been curbing |
| you have been curbing |
| he/she/it has been curbing |
| we have been curbing |
| you all have been curbing |
| they have been curbing |
|
| Past |
| I curbed |
| you curbed |
| he/she/it curbed |
| we curbed |
| you all curbed |
| they curbed |
|
| I was curbing |
| you were curbing |
| he/she/it was curbing |
| we were curbing |
| you all were curbing |
| they were curbing |
|
| I had curbed |
| you had curbed |
| he/she/it had curbed |
| we had curbed |
| you all had curbed |
| they had curbed |
|
| I had been curbing |
| you had been curbing |
| he/she/it had been curbing |
| we had been curbing |
| you all had been curbing |
| they had been curbing |
|
| Future |
| I will curb |
| you will curb |
| he/she/it will curb |
| we will curb |
| you all will curb |
| they will curb |
|
| I will be curbing |
| you will be curbing |
| he/she/it will be curbing |
| we are curbing |
| you all will be curbing |
| they will be curbing |
|
| I will have curbed |
| you will have curbed |
| he/she/it will have curbed |
| we will have curbed |
| you all will have curbed |
| they will have curbed |
|
| I will have been curbing |
| you will have been curbing |
| he/she/it will have been curbing |
| we will have been curbing |
| you all will have been curbing |
| they will have been curbing |
|
