Arbor 语法树

Arbor turns English grammar into a map you can actually finish. 【Please note】Arbor's explanations are written in Simplified Chinese (简体中文). It is built for Chinese speakers learning English. The English sentences, exercises and reading passages are in English; the teaching around them is not. Vocabulary never ends — the more you learn, the more there is. Grammar is different. It is a finite set: 104 patterns carry almost all everyday English. Arbor lays those 104 out as a single map, so you always know where you are and what is left. ■ A forest you can finish Every grammar point is one tile, and its color is how well you know it: untouched, seen, practiced, mastered. You never have to guess "how good is my English" — one look at the map tells you. ■ Ten minutes a loop Read the explanation, do five kinds of exercises, read a short passage, then let spaced repetition bring it back on its own schedule. ■ Five exercise types, each training something different Build a sentence (word order), choose the form (contrast), fix the error (correction), pick the sentence for a meaning (production), and — when both sentences are correct — choose the one that sounds more natural. ■ Marked to your own progress Reading passages highlight the grammar you are currently learning. Tap a word for its meaning, tap a marker to see why that structure is used there. ■ Your own sentences, not just ours Import any text you like. Arbor annotates it, pulls out the grammar you are learning, and turns the sentences you actually read into review cards. No ads. No third-party analytics. Registration needs only an email — no phone number, no SMS code.