| singular | plural |
| Infinitive | | |
| buy | |
| present simple | | |
| 1 | I buy | we buy |
| 2 | you buy | you buy |
| 3 | he/she/it buys | they buy |
| past simple | | |
| 1 | I bought | we bought |
| 2 | you bought | you bought |
| 3 | he/she/it bought | they bought |
| future simple | | |
| 1 | I will/shall buy | we will/shall buy |
| 2 | you will/shall buy | you will/shall buy |
| 3 | he/she/it will/shall buy | they will/shall buy |
| conditional simple | | |
| 1 | I would buy | we would buy |
| 2 | you would buy | you would buy |
| 3 | he/she/it would buy | they would buy |
| present continuous | | |
| 1 | I am buying | we are buying |
| 2 | you are buying | you are buying |
| 3 | he/she/it is buying | they are buying |
| past continuous | | |
| 1 | I was buying | we were buying |
| 2 | you were buying | you were buying |
| 3 | he/she/it was buying | they were buying |
| future continuous | | |
| 1 | I will be buying | we will be buying |
| 2 | you will be buying | you will be buying |
| 3 | he/she/it will be buying | they will be buying |
| conditional continuous | | |
| 1 | I would be buying | we would be buying |
| 2 | you would be buying | you would be buying |
| 3 | he/she/it would be buying | they would be buying |
| present perfect | | |
| 1 | I have bought | we have bought |
| 2 | you have bought | you have bought |
| 3 | he/she/it has bought | they have bought |
| past perfect | | |
| 1 | I had bought | we had bought |
| 2 | you had bought | you had bought |
| 3 | he/she/it had bought | they had bought |
| future perfect | | |
| 1 | I will have bought | we will have bought |
| 2 | you will have bought | you will have bought |
| 3 | he/she/it will have bought | they will have bought |
| conditional perfect | | |
| 1 | I would have bought | we would have bought |
| 2 | you would have bought | you would have bought |
| 3 | he/she/it would have bought | they would have bought |
