Q: “I helped him bake cookies,” or “I helped him to bake cookies”? Which is right?
A: The short answer is that both are right. However, there are some occasions when the verb “help” is more likely to be followed by a “to” infinitive, and some by a “to”-less infinitive, though either construction would be correct.
When “help” itself is a “to” infinitive, for example, the following verb tends to be bare, or “to”-less.
As Jeremy Butterfield explains in Fowler’s Dictionary of Modern English Usage (4th ed.), English speakers have a “natural reluctance to allow the sequence to help + to-infinitive, that is, to repeat to. This reluctance means that the bare infinitive is usually chosen in such cases, but not always.”
For an early example of such avoidance, Butterfield cites this passage from Shakespeare’s Richard III (circa 1593): “The time will come when thou shalt wish for me / To help thee curse that poisonous bunchback’d toad.”
When the verb “help” appears without “to,” however, Shakespeare routinely follows it with a “to” infinitive, as in this example we’ve found from The Tempest (c. 1611): “Come, temperate nymphs, and help to celebrate / A contract of true love; be not too late.”
Style may also play a role, with “help” more likely to be followed by a “to” infinitive in some formal or literary writing. As Butterfield points out, “no doubt formality and literariness also have an influence.”
He gives this literary example, which we’ve expanded, from The Philosopher’s Pupil (1983), a novel by Iris Murdoch: “Hattie decided against the new dress which would look out of place on such a dismal wet morning, but she allowed Pearl to help her to stack up her hair.”
And we’ve found this formal example in nonfiction: “English language learners need visual stimulus to help them to process and store the information that comes from words” (What Every Teacher Should Know About Media and Technology, 2003, by Donna Walker Tileston).
Aside from special cases like those, Butterfield says, the use of the bare infinitive after the verb “help” is “preferred in everyday written and spoken English.” We’d say it’s more common, not necessarily preferred, in everyday English. And we’ll repeat here that both usages are standard English.
As for the etymology, the verb “help” meant to aid or assist when it showed up in Anglo-Saxon times. The earliest citation in the Oxford English Dictionary is from Pastoral Care (c. 897), King Ælfred’s Old English translation of a sixth-century treatise by Pope Gregory:
“He nyle gifan ðæt him God geaf, and helpan ðæs folces mid ðæm þe he his healp” (“He is not willing to give what God gave him, and help the people with his help from God”).
In the 12th century, writers began using “help” with an infinitive—it was a “to” infinitive at first. The OED includes two examples from around 1175:
“to seke gan, and þa deden helpen to buriene” (“to seek to go, and help to bury the dead”), from the Lambeth Homilies, a collection of Old English sermons.
“forr hemm itt hallp biforenn godd / to clennsenn hemm off sinne” (“for them, it helped to cleanse themselves of sin before God”), from the Ormulum, a book of biblical commentary.
In the 16th century, writers began using “help” with bare infinitives, as in these two Oxford examples:
“To helpe garnishe his mother tongue” (from a 1548 translation, overseen by Nicholas Udall, of Erasmus’s paraphrase, or retelling, of the New Testament in Latin).
“I wyll helpe synners turne to the [thee]” (from Goostly Psalmes and Spiritual Songs, 1535, Miles Coverdale’s translations of German hymns by Martin Luther and others).
If you’d like to read more, we’ve discussed infinitives several times on the blog, including a post in 2013 that explained why “to” isn’t part of the infinitive. It’s generally referred to as an “infinitive marker” or “infinitive particle.”