Why are the verb "is" and "use" being used together? Is the phrase "is using/to use motors" the correct form of "is use motors"?
"Is" and "use" are put together in this case because they are being used as two separate verbs with different purposes. "Is" is used as a part of the sentence structure of the first part of the sentence to introduce the result. "Use" is the main verb here and is used to state the action that comes as a result. This structure is a little bit more casual and may sound strange, but it is okay to use. To make the sentence sound less casual, you could say "we're able to use motors to actually actuate that" instead.
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