如Sunnyah can speak5 lanquages (Sunnyah會說五種語言),
Sunnyah can't dance (Sunnyah不會跳舞)。
如Sunnyah can't hear you because it is too noisy (因為很吵,我聽不到你的聲音)。
Sunnyah can go to the party tomorrow (Sunnyah 明天能參加派對)。
如 Sunny could run very fast when she was 18 (Sunny18歲的時候跑得很快),
Sunny could't sing when she was littly (Sunny小時候還不太會唱歌)。
It can be difficult for a 3-year-old learn to write(通常三歲小孩要學寫字很難),
My homework can be completed ahead time(我的作業可能提前完成)。
Sunny could be in the office now (Sunny現在有可能在辦公室),
The typhoon could get worse(颱風可能更加猛烈)。
could表示對「過去」的一般描述,
It could be very hot in the summer(這裡夏天以前有時候蠻熱的)。
如Sunny could heve been waiting for along time (Sunny可能等很久了)。
Sunny couldn't probably accept the invitation (Sunny不可能接受邀請)。