PRESENT: Jeff speaks. [pres. verb (+ 3rd sn. s)]
PAST: Jeff spoke. [past verb form]
PRESENT: Jeff has spoken. [has/have + past participle verb form]
PAST: Jeff had spoken. [had + past participle verb form HAVE + PAST PARTICIPLE]
PRESENT: Jeff is speaking. [is/are + present verb + ing]
PAST: Jeff was speaking. [was/were + present verb + ing BE + PRESENT VERB + ING]
PRESENT: Jeff had been speaking. [had + been + present verb + ing]
PAST: Jeff had been speaking. [had + been + present verb + ing
HAVE + BEEN + PRESENT + ING]