PLEASE HELP Choose the sentence that contains an error in grammar usage.

Coryn had complete the race before the rain started.
Coryn had complete the race before the rain started.

They had traveled to the ocean before boarding the ship.
They had traveled to the ocean before boarding the ship.

I started singing lessons after I watched a wonderful opera.
I started singing lessons after I watched a wonderful opera.

As of yesterday, Tom and Chris had reviewed the material six times.

You must not do anything

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form