When the weather was good, i could......... my bike in the park

When the weather was good, I could ride my bike in the park.

Когда погода была хорошей, я мог ездить на велосипеде в парке.

[wɛn]  [ðə]   [wɛðə]   [wɒz]  [gʊd],  [aɪ]   [kʊd]   [raɪd]   [maɪ]   [baɪk]    [ɪn]    [ðə]  [pɑːk]

 Could is a modal verb. We use infinitive without to after modal verbs.