6.001 Structure and Interpretation of Computer Programs. Copyright o 2004 by Massachusetts Institute of Technology 6.001 Notes: Section 9.1 Slide 9.1.1 Manipulating complex numbers In the last lecture, we introduced symbols into our language

Slide 16.1.1 Building up a language Last time, we completed building our evaluator. And as you saw, we slightly misled you. We started off saying we were going to user Scheme's lexical analyzer and parser, but then build our own evaluator, which we did initially for arithmetic

Evaluation and universal machines The Eval/Apply Cycle What is the role of evaluation in defining a language? Eval and Apply execute a cycle that unwinds our abstractions Reduces to simple applications of built in

1.The acquisition-learning distinction 2. The input hypothesis 3.The monitor hypothesis 4. The affective Filter hypothesis 5.The natural order hypothesis

I. Explain the italicized words or phrases in the following sentences. (20%) 1. All languages are dynamic rather than static, and hence a\rule\in any language can only bea statement of contemporary practice

Teaching Outline Background information Pre-reading questions Passage analysis Style and structure Spellings Word derivations Language points Useful expressions Weekly quiz

Teaching outline Duty report dictation Practice of the key sentence patterns Retell dialogue工 Role-play: Traffic problems in a big city Background information about language famil Questions for group discussion Passage analysis Weekly quiz

General Organization Comprehension Language points Interaction activity

Unit 5 Language structures Dialogue 1 Dialogue 2 Reading1&2

Unit siⅸ Text A I. Pre-Reading Task 1. What makes human beings different from animals? A. The ability to use tools. B. The learning and sharing of behavior . The use of language. 2. Do you think animals have a culture? If yes, give an example