T-rules

The T(ea)-rules (T(hee)-regels), are a set of conjugation rules used in the Dutch language to determine whether the second person singular/plural and the first and third person singular of a verb end in -t or not. These rules are related to the 't kofschip-rule, which is used to determine the verb end for past tenses and participles. The combined sets of rules are also known as the d/t-rules.

However the actual rules for Dutch conjugation are more complex.

Second person pronouns

Jij/je (2nd singular) The pronoun jij/je only makes the verb end in -t if it precedes the verb, and if the verb is in the present simple or present perfect indicative. Modal verbs and the future/conditional auxiliary zullen allow forms with and without -t (but the subject pronoun must still precede the verb for the -t form to appear). This pronoun is informal and can be used in written language.