Unservicable Snapped Unusable Cracked
solar energy
For example big or great.
You could use 'cutting tool' if you were really pedantic about it.
You can use other types of oil (canola, sunflower, grapeseed, ect.).
Eat.
30
It originated from the French -'nombre'
You could use a telescope
yes yes you can
frogs
your eyes
When you use a linking verb, the subject complement usually needs to be a noun or an adjective. Broken is an adjective. Broke is usually a verb, though in slang, it is used as an adjective when discussing money. Yes you can use is with a verb. In that case, is would be an auxiliary verb rather than a linking verb. But in this case, the tenses would be incompatible. Is has a present tense, but broke is a past tense verb. You would need a present participle verb to use with a present tense auxiliary verb.