Образуйте все возможные формы инфинитива от следующих глаголов: достигать; развиваться; читать; изучать; вводить. Например:

1. Достигать - to reach, to be reaching, to have reached, to have been reaching, to be reached, to have been reached. 2. Развиваться - to develop, to be developing, to have developed, to have been developing, to be developed, to have been developed. 3. Читать - to read, to be reading, to have read, to have been reading, to be read, to have been read. 4. Изучать - to study, to be studying, to have studied, to have been studying, to be studied, to have been studied. 5. Вводить - to enter, to be entering, to have entered, to have been entering, to be entered, to have been entered.