when

Definition

Examples

Please let me know when the new equipment is installed.

Collocations

• Easy when will you arrive
  a collocation phrase: when will you arrive
• Medium call me when the client signs the contract
  to contact, summon, or announce regarding me when the client signs the contract
• Hard determine when statutory liability takes effect
  to determine when statutory liability takes effect, meaning to establish after a calculation, investigation, experiment, survey, or study
• Very Hard strike when the iron is hot
  to strike when the iron is hot, meaning to deliver a sharp blow, as with the hand, fist, or weapon