Bare infinitives：练习题

Identify the sentence where the bare infinitive is used correctly after the phrase had better.

In which of the following cases is a bare infinitive used correctly with the verb help?

Which of the following complex sentences correctly uses a bare infinitive in a why not structure?

Which of the following sentences contains a bare infinitive?

Which sentence correctly uses a bare infinitive after the expression had better?

Complete the sentence using the bare infinitive of the verb in brackets:
"The teacher wouldn't let the students ______ (leave) the classroom until they had finished their summaries."

Rewrite the following sentence using a bare infinitive after the verb 'let':
She allowed her brother to use her computer.

Change the following sentence into the passive voice, ensuring the bare infinitive changes to a to-infinitive:
The coach saw him win the race.

Analyze the following sentence and identify the grammatical error related to the bare infinitive:

"The coach made the players to run three laps before practice."

Explain what the error is and provide the corrected sentence.