The M- connector on chased allows it to act as a participle phrase modifying a noun, as shown in these examples.
to 20bp
to 20bp
The I connector is used for infinitives, as in:
to 20bp
Notice that the I connector is an alternative to the S connector on plural verb forms. Thus we take advantage of the fact that plural verb forms are usually the same as infinitive forms, and include them both in a single dictionary entry.
In a similar way, the T connector is used for past participles. Past participles have a T-; forms of the verb have have a T+. The GI connector is used for present participles. Present participles have a GI- connector; forms of the verb be have a GI+. The AI connector is used for predicative adjectives. Adjectives have a AI- connector; forms of be have a AI+ connector.