| Present "purchase" | I | purchase | |
| Present Continuous "purchase" | I | am purchasing | |
| Simple past "purchase" | I | purchased | |
| Past Continuous "purchase" | I | was purchasing | |
| Present perfect "purchase" | I | have purchased | |
| Present perfect continuous "purchase" | I | have been purchasing | |
| Past perfect "purchase" | I | had purchased | |
| Past perfect continuous "purchase" | I | had been purchasing | |
| Future "purchase" | I | will purchase | |
| Future continuous "purchase" | I | will be purchasing | |
| Future perfect "purchase" | I | will have purchased | |
| Future perfect continuous "purchase" | I | will have been purchasing |