`16` were playing ( QKTD+ when + QKD )
`17` Has Bill arrived / arrived ( yet - thì HTHT / ago- thì quá khứ đơn )
`18` have liked / was ( HTTD+ since + QKD )
`19` leave ( TLD + before + HTD )
`20` have had ( so far - thì HTHT )
`21` had phoned ( As soon as + QKD, QKHT)
`22` was walking / didn't see( QKD + when + QKTD ; Quá khứ đơn)
`23` have known / was ( HTHT + since + QKD )
`24` finishes ( TLD + until + HTD )
`25` haven't seen ( recently : thì hiện tại hoàn thành) / met ( The last time + QKD )
`26` sits ( usually- thì HTD ) / is seating ( now- thì HTTD )
`27` is going to rain ( thi tương lai gần )
`28` will be ( Hope + TLD)
`29` is coming ( thì hiện tại tiếp diễn )
`30` circles ( thì hiện tại đơn)
@ Dorris