$1.$ He can’t think what to say.

$2.$ They are not sure where to go.

$3.$ We don’t know where to put the sofa.

$4.$ I have no idea what to write my home paper about.

$5.$ No one could tell me how to start the engine.

$----$

$°$ Công thức thì hiện tại đơn:

$Tobe:$

$(+) S + am/is/are + N/Adj/...$

$(-) S + am/are/is + not + N/Adj/...$

$(?) Am/Are/Is + S + N/Adj/...?$

$V:$

$(+) S + V(s/es)$

$(-) S + do/does + not + V$

$(?) Do/Does + S + V?$

$@giaitoan1234$

Đáp án $+$ Giải thích các bước giải:

`1`. He can't think what to say.

`2`. They aren't sure where to go.

`3`. We don't know where to put the sofa.

`4`. I have no idea what to write my home paper about.

`5`. No one could tell me how to start the engine.

`-     -     -     -     -     -     -     -     -`

$*$ HTĐ $($Present simple tense$)$:

$*$ $V_{bare}$ 

`\circ` Khẳng định:

`->` I / you / we / they + `V_0` 

`->` He / she / it + `V_(s//es)`

`\circ` Phủ định:

`->` I / you / we / they + don't + `V_0` 

`->` He / she / it + doesn't + `V_0` 
`\circ` Nghi vấn:

`->` Do + I / you / we / they + `V_0`?

`->` Does + he / she / it + `V_0`? 
$*$ $V_{tobe}$ 
`\circ` Khẳng định:

`->` He / she / it + is 

`->` I + am

`->` You / we / they + are 

`\circ` Phủ định:

`->` He / she / it + isn't 

`->` I + am not 

`->` You / we / they + aren't 

`\circ` Nghi vấn:

`->` Tobe + S + O? 
$*$ Dấu hiệu:

`->` often, usually, always, never, sometimes,  everyday,... 

  `\text{#Minh}`