1. Using auxiliary verbs after BUT and AND
I don’t like coffee, but my husband does.
I like tea, but my husband doesn’t.
I won’t be here tomorrow, but Rin will.
I’ve seen that movie, but Tony hasn’t.
In (a): does = likes coffee.
After but and and, often only an auxiliary verb is used. It has the same tense or modal as the main verb.

2. Using auxiliary verbs after BUT and AND
I don’t like coffee, and Melba doesn’t either.
I like tea, and Kate does too.
I won’t be here, and he won’t either.
I’ve seen that movie, and Pat has too.
He isn’t here, and Anna isn’t either.
Notice the patterns below in the examples on the left:
negative + but + positive
positive + but + negative
negative + and + negative
positive + and + positive

3. Complete the sentences below with the correct auxiliary verbs.
Debbie reads a lot of books, but her brothers ____.
Sam isn’t in the school play this year, but Adam ____.
I will be at home tonight, but my roomate ______.
Ducks like to swim, but chickens _______.
That phone doesn’t work, but this one _______.

4. Using auxiliary verbs after BUT and AND
a) Sue works, and Tom does too.
b) Sue works, and so does Tom.
(a) and(b) have the same meaning
Word Order:
Subj. + Aux + too
So + Aux + Subj.
c) Anna doesn’t work, and Tom doesn’t either.
d) Anna doesn’t work, and neither does Tom.
c)and(d) have the same meaning
Subj. + Aux + either
Neither + Aux + Subj.