| Simple | Progressive | Perfect | Progressive |
| Present |
| I assemble |
| you assemble |
| he/she/it assembles |
| we assemble |
| you all assemble |
| they assemble |
|
| I am assembling |
| you are assembling |
| he/she/it is assembling |
| we are assembling |
| you all are assembling |
| they are assembling |
|
| I have assembled |
| you have assembled |
| he/she/it has assembled |
| we have assembled |
| you all have assembled |
| they have assembled |
|
| I have been assembling |
| you have been assembling |
| he/she/it has been assembling |
| we have been assembling |
| you all have been assembling |
| they have been assembling |
|
| Past |
| I assembled |
| you assembled |
| he/she/it assembled |
| we assembled |
| you all assembled |
| they assembled |
|
| I was assembling |
| you were assembling |
| he/she/it was assembling |
| we were assembling |
| you all were assembling |
| they were assembling |
|
| I had assembled |
| you had assembled |
| he/she/it had assembled |
| we had assembled |
| you all had assembled |
| they had assembled |
|
| I had been assembling |
| you had been assembling |
| he/she/it had been assembling |
| we had been assembling |
| you all had been assembling |
| they had been assembling |
|
| Future |
| I will assemble |
| you will assemble |
| he/she/it will assemble |
| we will assemble |
| you all will assemble |
| they will assemble |
|
| I will be assembling |
| you will be assembling |
| he/she/it will be assembling |
| we are assembling |
| you all will be assembling |
| they will be assembling |
|
| I will have assembled |
| you will have assembled |
| he/she/it will have assembled |
| we will have assembled |
| you all will have assembled |
| they will have assembled |
|
| I will have been assembling |
| you will have been assembling |
| he/she/it will have been assembling |
| we will have been assembling |
| you all will have been assembling |
| they will have been assembling |
|
