Take another look at the sentence:
Not only did Malinda
squeal at the sight of the beautiful bouquet,
also was tearing
open the box and eating chocolates all the
way to the restaurant.
When you use not only ... but also, you must
maintain parallel structure.
Malinda did squeal ..., a
main clause, follows
not only. She was tearing
..., another main clause, comes after but also.
Notice, however, that the second main clause has
was tearing and [was]
eating as its verbs.
This past progressive tense does not match the tense of the first main clause,
thus wrecking the parallelism.
To fix the sentence, change was tearing and
eating to tore
Go to the next sentence.