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Sentence analysis
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Sentence
Span Details
代替
substitution; replacement; alternative; substitutenoun, suru verb, no-adjective
エネルギー源
energy sourcenoun
を
object markergrammar
探す
search for; look for; seek; search through; rummage in; fish aroundgodan verb
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
が
subject markergrammar
ある。
be; exist; have; possess; there is available; be located; be situated; be equipped with; have as a facility or feature; happen; take place; come about; be in a completed state; be left as done-> 有るgodan verb, auxiliary