過去形 => Past form N5
Conjugate verbs
に過ぎない => no more than; just; merely; only ~ N2
ようと思う/ようと思っている => thinking of doing; planning to ~ N3
と思う => I think N5
と思っている => Plan to do something N4
Plan
かと思ったら/かと思うと => just when; no sooner than ~ N2
~かと思いきや => contrary to expectations; or so we thought, but ~ N1
Things do not match the prediction
~といっても言い過ぎではない => it is no exaggeration to say; it is not too much to say N1
Position, perspective
... にと思って => To do..., to let... N2
Purpose, target
…かと思ったら => just when; no sooner than ~ N2
Things do not match the prediction
てっきり...と思う => surely; certainly; without a doubt N3
~とおもう(~と思う)      => tend to, be about to… N4
Intent