Four stops, one grammar: have or has plus the past participle. Start with the rules, cross the hall and the market, open the seven gates, train the irregular verbs in the vault, and break the five seals of the last door.
The map of the quest
The rules first, and then three trials. Write the past participles, build statements with never, and ask the questions that start with ever.
Five trials in a row. Choose between ever and never, turn loose words into sentences, open the verb box, hunt the mistakes and finish the conversation at the camp.
Three new words arrive at the market and each one has its own place in the sentence. Rewrite, build, match, correct, and fill the letter that Henry is writing.
A game, not a trial. Twenty-nine irregular verbs, one at a time and against the clock. Keep your streak alive and beat your own best run.
Seven gates, and behind every one of them a table of verbs with pieces missing. Each gate asks for the same three forms, and each gate has two ways through it.
The last door has five seals on it, and behind each one there is a game: hunt the wrong word, choose between for and since, guess the third form, beat the gatekeeper at his grid, and race the hourglass. Win the five and the door opens.
This door is still closed. More trials of the present perfect are being written, and they will appear here as soon as they are ready.