Определить видовременные формы глаголов и написать их инфинитивв the secretary said that the engineers had cleared up all the points during the talks. there were some defects in the engine. model ac-30 does not meet the requirements of the customers. mr. bunin had the preliminary talks with goodman and co yesterday.

Ну, как я поняла, это делается так:
The secretary said (Past Simple Tense; inf. - to say) that the engineers had cleared up (Past Perfect Tense; inf. - to clear up) all the points during the talks.
There were (Past Simple Tense; inf - to be) some defects in the engine.
Model AC-30 does not meet (Present Simple Tense; inf - to meet) the requirements of the customers.
Mr. Bunin had (Past Simple Tense; inf - to have) the preliminary talks with Goodman and Co yesterday.
Надеюсь