To suggest that something happened in the past... perhaps it is just me, but does this question seem a little unnecessary?
The past tense is used to talk about something that has happened in the past. It is used with verbs. For example, I learned how to use the past tense last week.
The simple past tense of 'speak' is 'spoke' - so she spoke English
Afraid is used with the verb "to be," therefore, it does not have a past tense. In order to used afraid in the past tense, use the past version of the verb "to be" as in: Michael Jackson was afraid.
The past tense is trialed (US English) or trialled (British English)
The past tense is realised (British English) or realized (US English)
Learnt or learned, depending on whether you use American or British English.
The past tense of "see" in English is "saw."
The past tense of "prove" is "proved" in British English and "proven" in American English.
The past tense of "worship" is "worshipped" in British English or "worshiped" in American English.
The past tense of "dial" is "dialed" in American English and "dialled" in British English.
The past tense of "level" is "leveled" in American English and "levelled" in British English.
The past tense of "label" would be "labeled".