Lesson 9 / handout 9a Key words: plain infinitive = bare infinitive = inf. without to = go, work, sit, … full infinitive = infinitive with to = to go, to work, to sit, … progressive infinitive = used to form the future progressive tense (will be working) and other verb combinations (hope to be sitting) that refer to sth in progress, and therefore uncompleted, at a time-point such as this time next week passive infinitive = (to) be booked, (to) be done, … perfect infinitive = relates to time before that of the introductory verb (eg expected); may be in plain, full or in progressive form: have killed, to have killed, (to) have been killing, … passive progressive infinitive (rarely used) = (to) be being built, (to) be being done, … auxiliary verb x main verb (non-auxiliary verb): I am going home. X I am at home. Do you agree? Yes, I do agree. X I do my homework every day. interrogative = questions affirmative = positive statements; relating to a statement that shows agreement or says ‘yes’ (as opposed to negative & (question)) References: Gethin, H. (1992) Grammar in Context. Harlow: Longman. chapter 10, pp. 100 – 102.