| 1. | Base Form (Infinitive): | Cost |
| 2. | Simple Past: | Cost, Costed |
| 3. | Past Participle: | Cost, Costed |
| 4. | Present Participle: | Costing |
| 5. | 3rd Person Singular: | Costs |

Cost past tense
| Cost, Costed |
| Cost, Costed is the past tense of the word cost. |
Cost past participle
| Cost, Costed |
| Cost, Costed is the past participle of the word cost. |
Cost verb forms V1 V2 V3 V4
| Infinitive | Past Simple | Past Participle | Present Participle |
|---|---|---|---|
| Cost | Cost, Costed | Cost, Costed | Costing |
Conjugation of Cost
| Simple / Indefinite Present Tense |
| I cost. |
| He/She/It costs. |
| You/We/They cost. |
| Simple Past Tense |
| I cost. |
| He/She/It cost. |
| You/We/They cost. |
| Simple Future Tense |
| I will/shall cost. |
| He/She/It will cost. |
| You/We/They will/shall cost. |
| Present Continuous Tense |
| I am costing. |
| He/She/It is costing. |
| You/We/They are costing. |
| Past Continuous Tense |
| I was costing. |
| He/She/It was costing. |
| You/We/They were costing. |
| Future Continuous Tense |
| I will be costing. |
| He/She/It will be costing. |
| You/We/They will be costing. |
| Present Perfect Tense |
| I have cost. |
| He/She/It has cost. |
| You/We/They have cost. |
| Past Perfect Tense |
| I had cost. |
| He/She/It had cost. |
| You/We/They had cost. |
| Future Perfect Tense |
| I will have cost. |
| He/She/It will have cost. |
| You/We/They will have cost. |
| Present Perfect Continuous Tense |
| I have been costing. |
| He/She/It has been costing. |
| You/We/They have been costing. |
| Past Perfect Continuous Tense |
| I had been costing. |
| He/She/It had been costing. |
| You/We/They had been costing. |
| Future Perfect Continuous Tense |
| I will have been costing. |
| He/She/It will have been costing. |
| You/We/They will have been costing. |