• Present Perfect vs Past SimpleB1Life and travel experiences with ever, never, already and yet vs finished past time12 道题添加到我的练习
• First conditionalB1Real future situations and results: if + present simple, will + infinitive (the environment)12 道题添加到我的练习
• Must, have to, shouldB1Obligation, prohibition, lack of necessity and advice with must, have to and should12 道题添加到我的练习
• Passive voice: present and pastB1Present simple and past simple passive: am/is/are and was/were + past participle12 道题添加到我的练习
• Used toB1Past habits and states with used to, didn't use to and did you use to (childhood, friends, family)12 道题添加到我的练习
• Present Perfect ContinuousB1Actions that started in the past and are still continuing, or have just stopped, with have/has been + -ing12 道题添加到我的练习
• Question tagsB1Short questions added to statements to check information or invite agreement, such as isn't it? and did you?12 道题添加到我的练习
• Too and enoughB1Too + adjective and (not) + adjective/noun + enough to describe excess and sufficiency12 道题添加到我的练习
• Past PerfectB1Past perfect for the earlier of two past actions, with when, after, by the time, already and never12 道题添加到我的练习
• Articles in contextB1A/an, the and no article: first and second mention, jobs, unique things, superlatives and set phrases12 道题添加到我的练习