1. Uses of 了 introduced in Lesson 5 Aspect particle了 Modal particle了

4. L. 5: Uses of 了 past negative affirmative

5. L. 5: Uses of 了 past negative object irrelevant No 了 沒 before first verb affirmative

6. L. 5: Uses of 了 past object unmodified 了 end of sentence only affirmative negative

7. L. 5: Uses of 了 past object unmodified 了 end of sentence only object modified 了 after verb or end of sentence affirmative negative

8. L. 5: Uses of 了 past object unmodified 了 end of sentence only object modified 了 after verb or end of sentence object quantified 了 after last verb affirmative negative

9. L. 5: Uses of 了 past object unmodified 了 end of sentence only object modified 了 after verb or end of sentence object quantified 了 after last verb affirmative negative