I am writing a description for a video. I want to know which of the following is more correct:
The next step is to define the cross section of the member.
The next step is define the cross section of the member
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Number 1 is correct because you want to use it as an infinitive verb. Here is a brief explanation with some examples:
There are several possible ways to use infinitive verbs. You can use them:
- as the subject of a sentence – To err is human; to forgive, divine.
- like an adjective or adverb phrase that expresses purpose or intent – My instructions are to press this button every hour.
- following an indirect object – He told me to give this to you.
- following certain other verbs - source