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When does a verb in a compound tense require 'avoir' as an auxiliary, and when does it require 'être'?

Almost all verbs will use 'avoir' when forming a compound tense - the perfect tense for example. This can be seen in the following example - "j'ai visité" (I visited). Here, the 1st person, singula...
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Answered by George C. • French tutor
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5 tins of soup have a total weight of 1750 grams. 4 tins of soup and 3 packets of soup have a total weight of 1490 grams. Work out the total weight of 3 tins of soup and 2 packets of soup.

5 tins of soup have a total weight of 1750 grams. --> from this, we can calculate the total weight of 1 tin of soup, with 1750÷5 = 350 grams 4 tins of soup and 3 packets of soup have a total weight of 149...
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Answered by Eszter S. • Maths tutor
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You have 10g of Sodium Carbonate, how many moles do I have to 2dp?

Sodium Carbonate is Na 2 CO 3 The molecular formula mass is 2xNa + 1xC + 3xO 2x23 + 1x12 + 3x16 = 106 g/mol m = 10g Mr = 106 g/moln=m/Mrn = 10/106 = 0.09 mol
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Answered by Sophie B. • Chemistry tutor
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Describe the difference between TCP and UDP.

TCP (Transport Communication Protocol) allows for guaranteed communication between two machines. Connections are established with acknowledgements, and the receiver will also send acknowledgements when packe...
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Answered by Lewis W. • Computing tutor
2036 Views

Which verbs take haben and which take sein in the past tense?

All verbs which indicate movement (or lack thereof) require sein. Everything else requires haben. For example, 'ich bin gegangen,' and 'ich bin geblieben' both refer to movement/lack of movement, which is wh...
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Answered by Chris D. • German tutor
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