Замените инфинитивы данные в скобках ,герундием.
1After the recovery the patient stopped (to lose) his weight.
2 My brother had to give up ( to smoke) due to chronic bronchitis.
3 The young physician tried (to introduce) various new ways of treatment.
4 You must avoid ( to catch) a cold as you have just beem ill with pneumonia.
5 What has prevented you from ( to attend) this lecture?