Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
Synthesise is regular. It follows the -d Addition rule.
Use past time markers: "Yesterday, she synthesised to the store."
No. Use "did not synthesise" (not "did not synthesised").
The verb synthesise follows the standard English past tense conjugation rule. When forming the past tense, synthesise becomes synthesised. This follows the -d Addition pattern, which is one of the most common conjugation rules in English.
Understanding why synthesise becomes synthesised helps with spelling and pronunciation. Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
When using synthesised in writing, remember that it functions as a past tense verb and typically appears with time markers like yesterday, last week, or ago. For example: "Yesterday, she synthesised to the store." The past tense form does not change based on the subject — I synthesised, you synthesised, he/she synthesised, we synthesised, they synthesised.