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OK, I won’t OK, I will. Yes, I do. No, I don’t.
free; surprised fine; OK busy; ready ready; unprepared
remained to be done remaining to be done remained being done remaining to do
任一时刻i总大于0 任一时刻i总小于0 i值在0～Im之间变化 i值-Im～Im之间变化
OK, I will Sorry, I won’t OK, I don’t know I don’t think so
Probably Occasionally Frequently Actually
i= Im sin ω t i= Im sin（ω t＋90°） i= Im sin（ω t－90°） i= Im sin（ω t＋180°）.
i=Im sin（ω t＋180°） i=Im sin（ω t－180°） i=Im sin（ω t＋90°） i=Im sin（ω t－90°)
i=Im sin（ω t＋180°） i=Im sin（ω t－180°) i=Im sin（ω t＋90°） i=Im sin（ω t－90°）
come to the point take your time take your turn don’t hesitate
Probably Occasionally Frequently Actually
e=Imsinωt e=ImωLsin（ωt+90°） e=ImωLsin（ωt-90°） e=ImωLtsinωt
look for look at look after look like
help out help with come out turn on
look for look at look after look like
11Im1－3Im2＝ 5 11Im1＋3Im2＝5 11Im1＋3Im2＝－5 11Im1－3Im2＝－5
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