C1 Advanced Adverbs, participle clauses and ellipsis
Ellipsis and substitution
Lesson goal. After this lesson you can omit repeated material and use so / neither / one / do so to keep your sentences light and natural.
When to use it
- Agreeing in conversation: So do I. / Neither can I.
- Avoiding long repetition: I'd like to go, but I can't.
- Replacing a mentioned noun: My old phone broke, so I bought a new one.
- Replacing a whole clause: I hope so. / I'm afraid not.
Form
| Structure | Used when | Example |
|---|---|---|
| So + auxiliary + S | agreeing with an affirmative statement | “I'm hungry.” — “So am I.” |
| Neither / Nor + auxiliary + S | agreeing with a negative statement | “I can't swim.” — “Neither can I.” |
| ellipsis after an auxiliary | avoids repeating a long phrase | I'd like to go, but I can't. |
| one / ones | replaces a countable noun | a new one · bigger ones |
| so / not | replaces a whole clause | I hope so. · I'm afraid not. |
| do so | replaces a whole verb phrase | He asked me to leave and I did so. |
Step by step
- Find the auxiliary in the original: am, do, did, can, have…
- With So / Neither: put that auxiliary before the subject, as in an inversion.
- No auxiliary in the original → borrow do / does / did.
- When omitting, keep the auxiliary and cut everything repeated after it.
So do I is not So I do
| Sentence |
|---|
| “I like tea.” — “So do I.” |
| “You like tea.” — “So I do.” |
| “I can't cook.” — “Neither can I.” |
| “I'm tired.” — “So am I.” |
Examples
“I love this song.” — “So do I.”
“I haven't finished.” — “Neither have I.”
I don't like coffee, and neither does my sister.
I'd like to go, but I can't.
My old phone broke, so I bought a new one.
“Will it rain?” — “I'm afraid so.”
Common mistakes
“I like tea.” — “So I do.” → “I like tea.” — “So do I.”
Agreement requires inversion: So + auxiliary + subject. So I do means something else entirely.
“I can't swim.” — “So can't I.” → “I can't swim.” — “Neither can I.”
For a negative use Neither / Nor, with the auxiliary in the positive form.
I'd like to go but I can't to. → I'd like to go but I can't.
When you omit, cut cleanly; do not leave a stray to after can't.
Memory tip
Learners repeat the whole phrase to be safe. In English repetition sounds heavy; keeping the auxiliary and cutting the rest is what sounds natural.
Summary
- So / Neither + auxiliary + subject — always inverted.
- With no auxiliary in the original, borrow do / does / did.
- one / ones for nouns · so / not for clauses · do so for verb phrases.
Practise this lesson
Do exercises with an explanation for every question, take mini tests and track your progress on GrammUp.