1,Ten years of waiting (mean ) nothing to those who are in love. 2,The students in the next classroom (talk) very loudly now. 3,Not only his friends but also Tom (like) soccer. 4,The news (be) so bad that I burnt into tears. 5,The classroom with 10 tables (have)20 chair in it. 6,Econonnics (not interest) me as much as English does. 7,A numbers of students in my class (not be) good at English. 8, Both of the computer (not be) norking 9,Learning a foreign language(be) necessary at all time.

`1` means

`-` Diễn tả một việc hiển nhiên `->` HTĐ; S + V (s/es)

`-` "ten ... of waiting" là S số ít (chỉ thời gian) `=>` thêm s

`2` are talking

`-` có now `=>` HTTD: S + is/am/are + V-ing

`-` S số nhiều `->` are

`3` likes

`-` Not only + S1 + but also + S2 + V (chia theo S2)

`-` Diễn tả sở thích `->` HTĐ: S + V (s/es)

`-` Tom là S số ít `->` thêm s

`4` was

`-` Mệnh đề sau that chia ở QKĐ `=>` vế trước cũng chia ở QKĐ: S + was/were + adj/N

`-` news là S số ít `->` was

`5` has

`-` Miêu tả `->` HTĐ: S + V (s/es)

`-` "the classroom with 10 tables" là S số ít `->` has

`6` doesn't interest

`-` Diễn tả interest `->` HTĐ: S + don't/doesn't + V

`-` "economics: ngành kinh tế" `->` S số ít `->` doesn't

`7` aren't

`-` A number of + N số nhiều + V (số nhiều)

`8` aren't

`-` Both of + N + V (số nhiều)

`-` HTTD: S + is/am/are + (not) + V-ing `=>` are

`9` is

`-` Diễn tả sự thật `=>` HTĐ: S + is/am/are + adj/N