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"Puppet" is a noun. It does not change form from present tense to a past tense.
The past tense of "x-ray" is spelled as "x-rayed."
The past tense of 'spell' is 'spelled'. 'Spelt' is also used in British English.
The past tense is dealt.
The past tense of "query" is spelled as "queried".
The past tense is "echoed."
There is no past tense of knew. It is the past tense of know.
In past tense, the word "enroll" is spelled "enrolled."
The past tense of scrub is scrubbed.
The past tense of "bathe" is "bathed".
The past tense of shovel is spelled shoveled.
In Australia, New Zealand and the United Kingdom, the past tense of spell is usually spelt, although spelled is sometimes used.In the USA, the more commonly used past tense of spell is spelled.