English Verb - To Cost Infinitive - to cost Present participle - costing Past participle - cost 1. Present Tense Singular I cost You cost He/she/it costs Plural We cost You cost They cost 2. Present Progressive Tense Singular I am costing You are costing He/she/it is costing Plural We are costing You are costing They are costing 3. Past Tense Singular I cost You cost He/she/it cost Plural We cost You cost They cost 4. Present Perfect Tense Singular I have cost You have cost He/she/it has cost Plural We have cost You have cost They have cost 5. Present Perfect Progressive Tense Singular I have been costing You have been costing He/she/it has been costing Plural We have been costing You have been costing They have been costing 6. Past Progressive Tense Singular I was costing You were costing He/she/it was costing Plural We were costing You were costing They were costing 7. Past Perfect Tense Singular I had cost You had cost He/she/it had cost Plural We had cost You had cost They had cost 8. Past Perfect Progressive Tense Singular I had been costing You had been costing He/she/it had been costing Plural We had been costing You had been costing They had been costing 9. Future Tense Singular I will cost You will cost He/she/it will cost Plural We will cost You will cost They will cost 10. Future Progressive Tense Singular I will be costing You will be costing He/she/it will be costing Plural We will be costing You will be costing They will be costing 11. Future Perfect Tense Singular I will have cost You will have cost He/she/it will have cost Plural We will have cost You will have cost They will have cost 12. Future Perfect Progressive Tense Singular I will have been costing You will have been costing He/she/it will have been costing Plural We will have been costing You will have been costing They will have been costing