What is the rule for past simple verbs ending in Ld?

There isn't a specific rule for past simple verbs ending in "ld". The past tense of verbs ending in "ld" is formed according to general past tense formation rules, which depend on the specific verb:

* Regular verbs: Add "ed" to the base form. For example:

* Hold -> held

* Yield -> yielded

* Build -> built

* Irregular verbs: These have their own unique past tense forms that don't follow a predictable pattern. For example:

* Hold -> held (irregular)

* Sell -> sold (irregular)

* Tell -> told (irregular)

Therefore, there is no single rule for forming the past tense of verbs ending in "ld". You need to consider whether the verb is regular or irregular.