“Have” as an auxiliary verb Another way to usehaveis as an auxiliary verb. Auxiliary verbs are also known as ‘helping verbs’ because they are used with main verbs to show the tense or ask a question.Haveis often used in thepresent perfecttense. But when do you usehasandhave? Youhav...
aWater is the basis of all life,is the undispensible resource for the development of economie and society. However, with the rapid growing of population and the amount of industrial and agricultural production, water has been facing a severe shock. 水是所有生活的依据,是undispensible资源为economie...
You can also ask, “What have you been up to?”that is similar to‘What’s up?”“What have you been doing?” Is basically a way of asking,“What’s going on?” Or you could just ask,“What’s going on?” Or after a greeting you can say,“What’s new?” Let’s say you ...
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This week we talked about making things, and learned some new vocabulary: cook dinner, bake cookies, make jewelry, make a card, knit a scarf, play music. We also covered the past tense of those verbs (cooked, baked, made, knitted, played). Hecooked dinnerfor him/her/them. What did ...
This week we have been reviewing the work of Everybody Up 3. We practiced the sentence structures of Unit 2: "Where's the park? It's across from the ..." Where's the movie theater? It's between the ... and the ...". We also reviewed what people do at different places. "What...
Tip: Always think about two past events when using “had been.” The first action happens and ends before the second action begins. Present Perfect Tense 2. “Has Been” and “Have Been” (Present Perfect Tense) Both “has been” and “have been” describe actions or states that: ...
2. Results Current knowledge on the cellular roles of hybrid type N-glycans is quite limiting since glycosylation mutant cell lines for the Mgat2 gene have not been established until now. Here we compare the role of hybrid type N-glycans to the other two general types of N-glycans (e.g....