Find the infinitives and analyse their forms. 1. We know him to be working hard at a very interesting scientifi c problem. 2. We saw the farmer enter the barn. 3.…

Find the infinitives and analyse their forms. 1. We know him to be working hard at a very interesting scientifi c problem. 2. We saw the farmer enter the barn. 3. Combine-harvesters require the crop to be in dry conditions. 4. The agronomists expected this fi eld to produce high yield. 5. The chairman ordered the fi eld to be ploughed. 6. Do you consider these species to have been grown for many centuries? 7. They must be working in the garden now. 8. He promised not to tell anybody what he had seen.