1. Speaker 1 will make a speech supporting watching TV.

Question

2. Speaker 1 will make a speech supporting the advantages of watching TV.

3. Speaker 2 will make a speech dissupporting watching TV.

4. Speaker 2 will make a speech supporting the disadvantages of watching TV.

(Are they grammatical? What useful terms can we use instead?)

Answer 1

1. OK
2. OK
3. No
4. OK

For 3 --
Speaker 2 will make a speech about the disadvantages of watching TV.
OR
Speaker 2 will speak against watching TV.