Well, all your examples seem to have verbs after help : Vitamin E may help protect you. I will help make the spaceship. I help you improve your English.
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Anonymousall of you guys are incorrect. the "bare infinitive" is only applicable after words like help, make, have, etc when a direct object comes between the main verb and the infinitive. It's called a bare inifinitive because you drop the "to." Bare inifinitives also apply after modal auxiliaries and verbs of perception.I wouldn't go along with that.